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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.
This is an extremely confusing and poorly written problem. How on earth is it supposed to be solved, if I meet the test cases and I meet the criteria of the explanation, but don't meet the random tests? Please fix this.