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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.
Attempted this Kata in JS - working through it I was constanly reminded of the superiority and simplicity of Python. To be fair, I'm very new to JS.
Interesting kata, nonetheless. :)
Definitely not a 6kyu problem. This Kata should ideally be 8 kyu, 7kyu at best.