diff --git a/config.json b/config.json
index d6f851cb..491572cb 100644
--- a/config.json
+++ b/config.json
@@ -8,29 +8,21 @@
     "representer": false,
     "analyzer": false
   },
+  "test_runner": {
+    "average_run_time": 9
+  },
   "blurb": "Swift is a modern open-source language with the aim of making programming simple things easy, and difficult things possible while still being fast and safe by design. Swift can run in scripting mode in the included REPL or it can be compiled with full support for C and Objective-C interoperability.",
   "version": 3,
   "online_editor": {
     "indent_style": "space",
-    "indent_size": 2,
+    "indent_size": 4,
     "highlightjs_language": "swift"
   },
-  "test_runner": {
-    "average_run_time": 9
-  },
   "files": {
-    "solution": [
-      "Sources/%{pascal_slug}/%{pascal_slug}.swift"
-    ],
-    "test": [
-      "Tests/%{pascal_slug}Tests/%{pascal_slug}Tests.swift"
-    ],
-    "example": [
-      ".meta/Sources/%{pascal_slug}/%{pascal_slug}Example.swift"
-    ],
-    "exemplar": [
-      ".meta/Sources/%{pascal_slug}/%{pascal_slug}Exemplar.swift"
-    ]
+    "solution": ["Sources/%{pascal_slug}/%{pascal_slug}.swift"],
+    "test": ["Tests/%{pascal_slug}Tests/%{pascal_slug}Tests.swift"],
+    "example": [".meta/Sources/%{pascal_slug}/%{pascal_slug}Example.swift"],
+    "exemplar": [".meta/Sources/%{pascal_slug}/%{pascal_slug}Exemplar.swift"]
   },
   "exercises": {
     "concept": [
@@ -51,47 +43,31 @@
         "concepts": [
           "booleans"
         ],
-        "prerequisites": [
-          "basics"
-        ],
+        "prerequisites": ["basics"],
         "status": "beta"
       },
       {
         "slug": "freelancer-rates",
         "name": "Freelancer Rates",
         "uuid": "3bdad781-47e1-493a-834d-ca6ac8361ffd",
-        "concepts": [
-          "numbers"
-        ],
-        "prerequisites": [
-          "basics"
-        ],
+        "concepts": ["numbers"],
+        "prerequisites": ["basics"],
         "status": "active"
       },
       {
         "slug": "custom-signs",
         "name": "Cal's Custom Sign Shop",
         "uuid": "ac9b14eb-b521-4f2b-bc4b-1bd0e3e35ae7",
-        "concepts": [
-          "characters-and-strings"
-        ],
-        "prerequisites": [
-          "numbers",
-          "booleans"
-        ],
+        "concepts": ["characters-and-strings"],
+        "prerequisites": ["numbers", "booleans"],
         "status": "active"
       },
       {
         "slug": "secret-agent",
         "name": "Secret Agent Double-Null0111",
         "uuid": "eb8ccbb6-79af-4417-b934-e07fb496aaf2",
-        "concepts": [
-          "escaping-functions",
-          "higher-order-functions"
-        ],
-        "prerequisites": [
-          "basics"
-        ],
+        "concepts": ["escaping-functions", "higher-order-functions"],
+        "prerequisites": ["basics"],
         "status": "active"
       },
       {
@@ -102,46 +78,31 @@
           "conditionals",
           "ternary-operator"
         ],
-        "prerequisites": [
-          "characters-and-strings"
-        ],
+        "prerequisites": ["characters-and-strings"],
         "status": "active"
       },
       {
         "slug": "magician-in-training",
         "name": "Magician-in-Training",
         "uuid": "e6143dbc-895e-47aa-b42c-3034e1f872c2",
-        "concepts": [
-          "arrays"
-        ],
-        "prerequisites": [
-          "conditionals"
-        ],
+        "concepts": ["arrays"],
+        "prerequisites": ["conditionals"],
         "status": "active"
       },
       {
         "slug": "santas-helper",
         "name": "Santa's Swifty Helper",
         "uuid": "f371c072-082b-496b-aa58-45b6cba203f6",
-        "concepts": [
-          "tuples"
-        ],
-        "prerequisites": [
-          "arrays"
-        ],
+        "concepts": ["tuples"],
+        "prerequisites": ["arrays"],
         "status": "active"
       },
       {
         "slug": "pizza-slices",
         "name": "Slice Sizing",
         "uuid": "9d0bb0ad-904c-4d61-9d2c-ae37913d5741",
-        "concepts": [
-          "optionals"
-        ],
-        "prerequisites": [
-          "tuples",
-          "conditionals"
-        ],
+        "concepts": ["optionals"],
+        "prerequisites": ["tuples", "conditionals"],
         "status": "active"
       },
       {
@@ -155,11 +116,7 @@
           "repeat-while",
           "control-transfer"
         ],
-        "prerequisites": [
-          "arrays",
-          "optionals",
-          "tuples"
-        ],
+        "prerequisites": ["arrays", "optionals", "tuples"],
         "status": "active"
       },
       {
@@ -172,39 +129,23 @@
           "shorthand-arguments",
           "trailing-closures"
         ],
-        "prerequisites": [
-          "basics",
-          "higher-order-functions",
-          "loops"
-        ],
+        "prerequisites": ["basics", "higher-order-functions", "loops"],
         "status": "active"
       },
       {
         "slug": "high-score-board",
         "name": "High Score Board",
         "uuid": "74cb167d-7418-4327-9dd8-9852082127b0",
-        "concepts": [
-          "dictionaries"
-        ],
-        "prerequisites": [
-          "basics",
-          "optionals"
-        ],
+        "concepts": ["dictionaries"],
+        "prerequisites": ["basics", "optionals"],
         "status": "active"
       },
       {
         "slug": "poetry-club",
         "name": "The 1st Rule of Poetry Club",
         "uuid": "082d7aeb-ee25-4217-bd6f-82532a65797a",
-        "concepts": [
-          "importing",
-          "string-components",
-          "string-indexing"
-        ],
-        "prerequisites": [
-          "arrays",
-          "optionals"
-        ],
+        "concepts": ["importing", "string-components", "string-indexing"],
+        "prerequisites": ["arrays", "optionals"],
         "status": "active"
       },
       {
@@ -219,11 +160,7 @@
           "inout-parameters",
           "nested-functions"
         ],
-        "prerequisites": [
-          "arrays",
-          "conditionals",
-          "tuples"
-        ],
+        "prerequisites": ["arrays", "conditionals", "tuples"],
         "status": "active"
       },
       {
@@ -236,23 +173,15 @@
           "structs-and-classes",
           "value-and-reference-types"
         ],
-        "prerequisites": [
-          "basics",
-          "function-overloading"
-        ],
+        "prerequisites": ["basics", "function-overloading"],
         "status": "active"
       },
       {
         "slug": "log-lines",
         "name": "Log Lines",
         "uuid": "0a634d93-d073-4a2b-b6c4-1ba53c04b2bb",
-        "concepts": [
-          "enumerations"
-        ],
-        "prerequisites": [
-          "string-components",
-          "structs-and-classes"
-        ],
+        "concepts": ["enumerations"],
+        "prerequisites": ["string-components", "structs-and-classes"],
         "status": "active"
       }
     ],
@@ -264,6 +193,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
+        "topics": null,
         "status": "deprecated"
       },
       {
@@ -273,6 +203,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
+        "topics": null,
         "status": "deprecated"
       },
       {
@@ -282,6 +213,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
+        "topics": null,
         "status": "deprecated"
       },
       {
@@ -291,6 +223,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
+        "topics": null,
         "status": "deprecated"
       },
       {
@@ -300,10 +233,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "integers",
-          "math"
-        ]
+        "topics": ["integers", "math"]
       },
       {
         "slug": "gigasecond",
@@ -312,9 +242,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "dates"
-        ]
+        "topics": ["dates"]
       },
       {
         "slug": "hello-world",
@@ -323,10 +251,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "optional_values",
-          "text_formatting"
-        ]
+        "topics": ["optional_values", "text_formatting"]
       },
       {
         "slug": "leap",
@@ -335,9 +260,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "integers"
-        ]
+        "topics": ["integers"]
       },
       {
         "slug": "rna-transcription",
@@ -346,10 +269,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "strings",
-          "transforming"
-        ]
+        "topics": ["strings", "transforming"]
       },
       {
         "slug": "space-age",
@@ -358,10 +278,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "discriminated_unions",
-          "floating_point_numbers"
-        ]
+        "topics": ["discriminated_unions", "floating_point_numbers"]
       },
       {
         "slug": "sum-of-multiples",
@@ -370,11 +287,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "lists",
-          "math",
-          "transforming"
-        ]
+        "topics": ["lists", "math", "transforming"]
       },
       {
         "slug": "two-fer",
@@ -383,10 +296,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1,
-        "topics": [
-          "optional_values",
-          "text_formatting"
-        ]
+        "topics": ["optional_values", "text_formatting"]
       },
       {
         "slug": "reverse-string",
@@ -403,10 +313,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "recursion",
-          "transforming"
-        ]
+        "topics": ["recursion", "transforming"]
       },
       {
         "slug": "bob",
@@ -415,10 +322,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "control_flow_if_else_statements",
-          "strings"
-        ]
+        "topics": ["control_flow_if_else_statements", "strings"]
       },
       {
         "slug": "etl",
@@ -427,10 +331,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "maps",
-          "transforming"
-        ]
+        "topics": ["maps", "transforming"]
       },
       {
         "slug": "grade-school",
@@ -439,10 +340,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "maps",
-          "sorting"
-        ]
+        "topics": ["maps", "sorting"]
       },
       {
         "slug": "grains",
@@ -451,9 +349,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "integers"
-        ]
+        "topics": ["integers"]
       },
       {
         "slug": "hamming",
@@ -462,10 +358,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "filtering",
-          "strings"
-        ]
+        "topics": ["filtering", "strings"]
       },
       {
         "slug": "isogram",
@@ -474,10 +367,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "filtering",
-          "strings"
-        ]
+        "topics": ["filtering", "strings"]
       },
       {
         "slug": "list-ops",
@@ -503,10 +393,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "maps",
-          "strings"
-        ]
+        "topics": ["maps", "strings"]
       },
       {
         "slug": "raindrops",
@@ -515,10 +402,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 2,
-        "topics": [
-          "filtering",
-          "text_formatting"
-        ]
+        "topics": ["filtering", "text_formatting"]
       },
       {
         "slug": "binary-search",
@@ -527,10 +411,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "lists",
-          "searching"
-        ]
+        "topics": ["lists", "searching"]
       },
       {
         "slug": "circular-buffer",
@@ -555,10 +436,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "structural_equality",
-          "time"
-        ]
+        "topics": ["structural_equality", "time"]
       },
       {
         "slug": "collatz-conjecture",
@@ -567,10 +445,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "integers",
-          "math"
-        ]
+        "topics": ["integers", "math"]
       },
       {
         "slug": "diamond",
@@ -579,9 +454,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "strings"
-        ]
+        "topics": ["strings"]
       },
       {
         "slug": "flatten-array",
@@ -590,11 +463,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "lists",
-          "looping",
-          "searching"
-        ]
+        "topics": ["lists", "looping", "searching"]
       },
       {
         "slug": "isbn-verifier",
@@ -603,12 +472,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "conditionals",
-          "loops",
-          "pattern_matching",
-          "strings"
-        ]
+        "topics": ["conditionals", "loops", "pattern_matching", "strings"]
       },
       {
         "slug": "kindergarten-garden",
@@ -617,10 +481,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "enumerations",
-          "parsing"
-        ]
+        "topics": ["enumerations", "parsing"]
       },
       {
         "slug": "perfect-numbers",
@@ -629,11 +490,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "discriminated_unions",
-          "integers",
-          "math"
-        ]
+        "topics": ["discriminated_unions", "integers", "math"]
       },
       {
         "slug": "phone-number",
@@ -642,10 +499,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "parsing",
-          "transforming"
-        ]
+        "topics": ["parsing", "transforming"]
       },
       {
         "slug": "protein-translation",
@@ -668,10 +522,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "algorithms",
-          "strings"
-        ]
+        "topics": ["algorithms", "strings"]
       },
       {
         "slug": "queen-attack",
@@ -680,9 +531,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "tuples"
-        ]
+        "topics": ["tuples"]
       },
       {
         "slug": "robot-name",
@@ -691,10 +540,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "randomness",
-          "strings"
-        ]
+        "topics": ["randomness", "strings"]
       },
       {
         "slug": "robot-simulator",
@@ -703,10 +549,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "records",
-          "tuples"
-        ]
+        "topics": ["records", "tuples"]
       },
       {
         "slug": "scale-generator",
@@ -715,11 +558,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "loops",
-          "pattern_matching",
-          "strings"
-        ]
+        "topics": ["loops", "pattern_matching", "strings"]
       },
       {
         "slug": "scrabble-score",
@@ -728,9 +567,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "transforming"
-        ]
+        "topics": ["transforming"]
       },
       {
         "slug": "secret-handshake",
@@ -739,10 +576,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "bitwise_operations",
-          "lists"
-        ]
+        "topics": ["bitwise_operations", "lists"]
       },
       {
         "slug": "sieve",
@@ -751,10 +585,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "filtering",
-          "math"
-        ]
+        "topics": ["filtering", "math"]
       },
       {
         "slug": "strain",
@@ -763,10 +594,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "filtering",
-          "sequences"
-        ]
+        "topics": ["filtering", "sequences"]
       },
       {
         "slug": "sublist",
@@ -775,10 +603,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "lists",
-          "looping"
-        ]
+        "topics": ["lists", "looping"]
       },
       {
         "slug": "triangle",
@@ -787,10 +612,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 3,
-        "topics": [
-          "discriminated_unions",
-          "integers"
-        ]
+        "topics": ["discriminated_unions", "integers"]
       },
       {
         "slug": "bottle-song",
@@ -807,10 +629,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "strings",
-          "transforming"
-        ]
+        "topics": ["strings", "transforming"]
       },
       {
         "slug": "all-your-base",
@@ -819,11 +638,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "integers",
-          "math",
-          "transforming"
-        ]
+        "topics": ["integers", "math", "transforming"]
       },
       {
         "slug": "allergies",
@@ -832,11 +647,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "bitwise_operations",
-          "enumerations",
-          "filtering"
-        ]
+        "topics": ["bitwise_operations", "enumerations", "filtering"]
       },
       {
         "slug": "anagram",
@@ -845,10 +656,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "filtering",
-          "strings"
-        ]
+        "topics": ["filtering", "strings"]
       },
       {
         "slug": "house",
@@ -857,10 +665,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "algorithms",
-          "text_formatting"
-        ]
+        "topics": ["algorithms", "text_formatting"]
       },
       {
         "slug": "largest-series-product",
@@ -869,12 +674,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "integers",
-          "math",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["integers", "math", "strings", "transforming"]
       },
       {
         "slug": "matrix",
@@ -883,10 +683,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "matrices",
-          "parsing"
-        ]
+        "topics": ["matrices", "parsing"]
       },
       {
         "slug": "meetup",
@@ -895,9 +692,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "dates"
-        ]
+        "topics": ["dates"]
       },
       {
         "slug": "pangram",
@@ -906,10 +701,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "searching",
-          "strings"
-        ]
+        "topics": ["searching", "strings"]
       },
       {
         "slug": "pascals-triangle",
@@ -918,11 +710,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "lists",
-          "math",
-          "recursion"
-        ]
+        "topics": ["lists", "math", "recursion"]
       },
       {
         "slug": "prime-factors",
@@ -931,10 +719,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "integers",
-          "math"
-        ]
+        "topics": ["integers", "math"]
       },
       {
         "slug": "pythagorean-triplet",
@@ -943,11 +728,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "integers",
-          "math",
-          "records"
-        ]
+        "topics": ["integers", "math", "records"]
       },
       {
         "slug": "rotational-cipher",
@@ -956,10 +737,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "strings",
-          "transforming"
-        ]
+        "topics": ["strings", "transforming"]
       },
       {
         "slug": "saddle-points",
@@ -968,10 +746,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "lists",
-          "matrices"
-        ]
+        "topics": ["lists", "matrices"]
       },
       {
         "slug": "say",
@@ -980,12 +755,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "loops",
-          "parsing",
-          "text_formatting",
-          "transforming"
-        ]
+        "topics": ["loops", "parsing", "text_formatting", "transforming"]
       },
       {
         "slug": "series",
@@ -994,11 +764,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "lists",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["lists", "strings", "transforming"]
       },
       {
         "slug": "simple-linked-list",
@@ -1007,9 +773,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "lists"
-        ]
+        "topics": ["lists"]
       },
       {
         "slug": "twelve-days",
@@ -1018,10 +782,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "algorithms",
-          "text_formatting"
-        ]
+        "topics": ["algorithms", "text_formatting"]
       },
       {
         "slug": "word-count",
@@ -1030,11 +791,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "topics": [
-          "maps",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["maps", "strings", "transforming"]
       },
       {
         "slug": "atbash-cipher",
@@ -1043,11 +800,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["algorithms", "strings", "transforming"]
       },
       {
         "slug": "binary-search-tree",
@@ -1056,10 +809,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "searching",
-          "trees"
-        ]
+        "topics": ["searching", "trees"]
       },
       {
         "slug": "crypto-square",
@@ -1068,11 +818,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["algorithms", "strings", "transforming"]
       },
       {
         "slug": "custom-set",
@@ -1081,9 +827,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "sets"
-        ]
+        "topics": ["sets"]
       },
       {
         "slug": "food-chain",
@@ -1092,10 +836,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "text_formatting"
-        ]
+        "topics": ["algorithms", "text_formatting"]
       },
       {
         "slug": "knapsack",
@@ -1112,9 +853,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "lists"
-        ]
+        "topics": ["lists"]
       },
       {
         "slug": "luhn",
@@ -1123,11 +862,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["algorithms", "strings", "transforming"]
       },
       {
         "slug": "ocr-numbers",
@@ -1136,10 +871,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "parsing",
-          "pattern_recognition"
-        ]
+        "topics": ["parsing", "pattern_recognition"]
       },
       {
         "slug": "roman-numerals",
@@ -1148,10 +880,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "recursion",
-          "transforming"
-        ]
+        "topics": ["recursion", "transforming"]
       },
       {
         "slug": "run-length-encoding",
@@ -1160,10 +889,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "transforming"
-        ]
+        "topics": ["algorithms", "transforming"]
       },
       {
         "slug": "simple-cipher",
@@ -1172,11 +898,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 5,
-        "topics": [
-          "algorithms",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["algorithms", "strings", "transforming"]
       },
       {
         "slug": "bowling",
@@ -1185,9 +907,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "algorithms"
-        ]
+        "topics": ["algorithms"]
       },
       {
         "slug": "complex-numbers",
@@ -1196,10 +916,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "math",
-          "tuples"
-        ]
+        "topics": ["math", "tuples"]
       },
       {
         "slug": "nth-prime",
@@ -1208,9 +925,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "math"
-        ]
+        "topics": ["math"]
       },
       {
         "slug": "palindrome-products",
@@ -1219,12 +934,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "algorithms",
-          "math",
-          "strings",
-          "tuples"
-        ]
+        "topics": ["algorithms", "math", "strings", "tuples"]
       },
       {
         "slug": "pig-latin",
@@ -1233,10 +943,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "strings",
-          "transforming"
-        ]
+        "topics": ["strings", "transforming"]
       },
       {
         "slug": "tournament",
@@ -1245,10 +952,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "parsing",
-          "text_formatting"
-        ]
+        "topics": ["parsing", "text_formatting"]
       },
       {
         "slug": "transpose",
@@ -1257,10 +961,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6,
-        "topics": [
-          "strings",
-          "transforming"
-        ]
+        "topics": ["strings", "transforming"]
       },
       {
         "slug": "matching-brackets",
@@ -1269,10 +970,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 7,
-        "topics": [
-          "parsing",
-          "strings"
-        ]
+        "topics": ["parsing", "strings"]
       },
       {
         "slug": "dominoes",
@@ -1281,10 +979,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 7,
-        "topics": [
-          "lists",
-          "tuples"
-        ]
+        "topics": ["lists", "tuples"]
       },
       {
         "slug": "minesweeper",
@@ -1293,10 +988,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 7,
-        "topics": [
-          "parsing",
-          "transforming"
-        ]
+        "topics": ["parsing", "transforming"]
       },
       {
         "slug": "wordy",
@@ -1305,11 +997,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 7,
-        "topics": [
-          "parsing",
-          "strings",
-          "transforming"
-        ]
+        "topics": ["parsing", "strings", "transforming"]
       },
       {
         "slug": "poker",
@@ -1318,12 +1006,7 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 8,
-        "topics": [
-          "discriminated_unions",
-          "games",
-          "parsing",
-          "sorting"
-        ]
+        "topics": ["discriminated_unions", "games", "parsing", "sorting"]
       },
       {
         "slug": "beer-song",
@@ -1332,12 +1015,8 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 4,
-        "status": "deprecated",
-        "topics": [
-          "conditionals",
-          "looping",
-          "strings"
-        ]
+        "topics": ["conditionals", "looping", "strings"],
+        "status": "deprecated"
       }
     ]
   },
@@ -1591,22 +1270,22 @@
     }
   ],
   "tags": [
-    "execution_mode/compiled",
     "paradigm/declarative",
     "paradigm/functional",
     "paradigm/imperative",
     "paradigm/object_oriented",
-    "platform/android",
-    "platform/ios",
-    "platform/linux",
-    "platform/mac",
-    "platform/windows",
-    "runtime/language_specific",
     "typing/static",
     "typing/strong",
+    "execution_mode/compiled",
+    "platform/windows",
+    "platform/mac",
+    "platform/linux",
+    "platform/ios",
+    "platform/android",
+    "runtime/language_specific",
     "used_for/backends",
     "used_for/frontends",
-    "used_for/guis",
-    "used_for/mobile"
+    "used_for/mobile",
+    "used_for/guis"
   ]
 }