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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.
When I try to attempt, I found out there are always some random cases that didn't work, but when I tried to print to see what were the problems, it suddenly says that I pass everything even if I didn't change anything. Can someone explain me why? Thanks in advance!