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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.
meet same situation. the kata seems has some mistakens. 98 and 99 are 'Almost' interesting.
This comment is hidden because it contains spoiler information about the solution
λ> groupCheck "([ab])"
False
this solution not works for there are some other chars in the string. as above.