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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 first value is what your function wrongly returned, not the input value. To see that, print it with
console.log
at the beginning of your code. The tests are fine.