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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.
Maybe he was careful
There are inputs generated with leading or trailing spaces and your solution fails them. These should be fixed.
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Your code is wrong, when in doubt, check how many completions there already are in that language:
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