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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.
You were probably mutating the string.
I love how it works only for one negative <3
Nevermind. I took a look at this problem again and I realized I had messed it up. I was just being dumb, and there is nothing wrong with the test case.
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