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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.
You should tell that Hash has been disabled in the instructions. I was trying my solution and wondering why it didn't work at all!
Just an idea: to make it case-sensitive or at least to state if the kata should be case-sensitive or not.