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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.
Very readable and clear. Me like :D
Sadly we can't downvote the best practices... But this solution does not work, and should not be accepted as a proper solution.
This deserves more best practices upvote. It is really better than the set solution, which does not handle duplicated characters.
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