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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.
Some tests added an extra space at the end, but that's fixed now.
Read this: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_OR#description, you can discuss solutions in Solutions section next time, maybe there is already an answer there too.