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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.
First of all, it would be really helpful if the code you posted was correctly formatted.
Another thing, your solution has a bug, and it most probably does not work in VSCode either if run more than one time. Put more than one test in your local code and see by yourself.
Your solution has a bug. Not a kata issue.