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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.
Your code will fail in VScode as well if you test it with the input that causes your code to break. In this case, your code fails on an input of
""(an empty string)