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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.
I really like the way you set up line one to get the name of the first attacker. Recursion is a clever solution there. Had you used division here instead of subtraction you could have avoided the loop.