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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.
Yes, there should be many more similar to that, I'm afraid.
The test coverage is not that good in all the languages.
It should return false, though. The order of the characters make it impossible to build "codewars".