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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.
Seems to be fixed
test cases should include cases with punctuations in string
My solution passes the submitting, but if I runs the test case, it raises error every time. Waste a lot of time on this bug.