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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.
You are mistaken. The reference solution gives the correct solution.
Language?
And please print the test here. If it is
solve "yiiiiiii", then0is correct. Please read the description.because your logic is wrong ;-)