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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.
The expected and the actual testcases are swapped around, so your solution is "###########5616" and the expected solution is "############5616".
Your solution has one less hash ("#") than the expected. The expected has 12 hashes and 16 characters total, and your solution has 11 hashes and 15 characters total.