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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.
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I agree.
Found more difficult katas rated lower than this involving regex.
Don't think it sould be at 5 kyu when this TicTacToe is at 6 kyu.
thank you, got it!)
Coming at it with pretty poor regex skills I found it as tricky as most other 5kyu kata I've tried