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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 agree as this kata https://www.codewars.com/kata/595a4838d41def8ef2000017 is identical to this kata but the solution I wrote for that kata doesn't work for this one.
it's the word d(if)ference