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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.
hi, I looked at your code and noticed that you output the result to the console instead of doing return, you were told about this with a link above.
your code works but can be improved, study string multiplication and array slice, these tools will make your life easier
Read this: https://docs.codewars.com/training/troubleshooting#.print-vs-return