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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.
The input string may or may not include spaces, and any space character should be ignored.
For instance, the following inputs "1 + 2 + 3", "1+2+3", and "1+ 2 +3" should have the same result.
I will note that in the instructions, thank you very much.