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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.
Look at the top of the page to see how many guys passed the Swift kata (98) so it is not a problem of the kata.
I think you should look again at your code. Print the input to see where you are failing. Cheers.
It is a question, not an issue. Please which language?