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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 cannot run the tests.
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I understand. I don't particularly like this kata. If like me you didn't "get it", you'll probably turn to Google for help. Lo and behold, the first result is the current best solution on here.