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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.
For some extrange reason, I thought the kata has to check if the number of instances is a PRIME number instead off ODD (realized when i saw the solutions from others), but somehow i passed the tests hahahahahahaha so don't trust my solution