{ "name": "Combinatorics", "order": 14, "challenges": [ { "id": "59a5801209a6acac5983b715", "title": "Permutations", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983b374", "title": "Combinations", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a5801209a6acac5983b375", "title": "Card Shuffling", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] } ] }