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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.
No mention of the language, the user was last seen in 2017, closing.
This does not classify as an issue with the kata. This is an issue with your own code.
Currently Codewars platform is experiencing issues. This is not a problem of the kata.