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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.
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Read the answer to the post below, it's explained there.
You are most probably not doomed but doing something wrong. According to your profile I guess you are coding in Java, I'm not good in this language and I didn't solve the kata in Java so I can't help you, but I strongly advice you to have a look at the documentation where you may find some helpful tips: https://docs.codewars.com/training/troubleshooting/