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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I also got this error. did you ever figure it out?
The sample tests are working for me, but the "attempt" butoon results in this error, which is not referring to my code: /tmp/swift117614-14-rbax7h.nlrsjaif6r/solution.swift:97:37: error: use of unresolved identifier 'CharacterSet'
.trimmingCharacters(in: CharacterSet(charactersIn: " "))
^~~~~~~~~~~~
Swift.Character:51:15: note: did you mean 'Character'?
public struct Character : _ExpressibleByBuiltinExtendedGraphemeClusterLiteral, ExpressibleByExtendedGraphemeClusterLiteral, Hashable {