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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.
For some reason this didn't pass the tests for me!
nicely done truly^^
Try your solution with my related kata, I think you'll learn a couple of things.
If so it probably means that your solution modifies input data which it shouldn't do.
( Description said :
Hope it helps!
; ) )