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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.
I spent half a day solving this kata, and when I finally found out the solution, I was surprised by the simplicity. Just imagine that you have just started programming and the solution to this kata will come by itself!