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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.
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there are additional tests when you click attempt, usually harder and random tests, too
That's because your code is wrong, print the input and figure out why. Not a kata issue.
add ; at the end of each lines.