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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.
how it works?
I'm guessing the tests cases were different at the time but today this code would fail.
I agree
if the input is a white space with length less than 140 your code will crash