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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.
Why should it?
Solution not necessarily one line.
May be better if the wording was changed to: "Return the sum between the numbers, inclusive. If the numbers are the same, return either number."