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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 the problem description could be more detailed:
If there are multi solutions, what if the upper left ones are the same? Then the next one should be compared ,and etc.