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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.
Hi,
Your first authored kata, I guess?
Well, first, congratulations, because it's nicely done, with everything that is needed/expected (just missing empty strings in the fixed tests). Unfortunately, the task you chose is not novel at all and we already have a (f..) lot of very similar problems. So if I were you, I'd unpublish it before it just gets retired because of this (meaning it will cost you some points because of the down votes).
Cheers