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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 feel you
This is the first question after 50+ challenges where I got the exact same solution as the top one.I would always get like the 3rd,4th best practice.
Just keep doing these and look at other people's solutions and try figure out their thought process.