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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.
Test.assertEqualsthis kata needs to be reviewed by the owner, you need to clarify what the output shouldbe because currently you return a string but looking at the tests you wanted to return an array and so on. I cannot help with random test cases because it is not clear what is expected.
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