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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 think it's nice to study ninja code. You learn more stuff this way. It's ok to reproduce it for studying reasons.
The issue is due to no sample tests. You have to click
attempt
to see the full test suite