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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.
Looks like the problem has been resolved.
Output in the 2nd test is the same as expected, but I can't pass this test. Please resolve this issue. And I have checked my result for differences in whitespaces. My result and test result are identical.