Loading collection data...
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.
No, you have not passed yet.
When you think you've finished writing code, then click on "ATTEMPT".
This will check the correctness of your code against more test cases.
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Click on "TRAIN" or "TRAIN AGAIN"
this function requires that you return a string