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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.
Cheers for confessing your mistake. Most don't :-)
Another "my solution is perfect, your kata is bad" user. Just manually checked all fixed tests and the reference solution - everything's correct.
My money goes to javascript. But I can't see what's wrong with them.
OK. This needs investigation.
Please say which language, which tests are wrong, and the reason you think so.