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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.
So, i've written the code, execute given tests and it's "outstanding!". But when I try to submit, there is only red bright error message without any comment what is wrong. There is no given input and no expected value.
How I am supposed to write working code without that important details? :)