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Last Seen:Feb 2021
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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 right, this kata makes no sense. I did manage to solve it, but the description wasn't that great to begin with.
Are you mutating the inputs?
Cruiser in the upper left corner are in contact with submarine.