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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.
I wish I could make it more clear, but with the number of people who already have solved this Kata now stops me from editing the test cases. I can't sorry.
Do check for the hint updated in the description.
Same issue. The instructions are vague and when submitting, the test cases do not offer any explanation when they fail.
This comment is hidden because it contains spoiler information about the solution