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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.
Thank you! I've updated kata, reflecting suggestion from you comment.
It should now throw an exception when either the string is not in the base from or string includes characters that are outside of 0->Z scope.