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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.
Input could be modified. Fixed.
'it works on my machine' is not a proper issue report. print the input, see what cases you are failing, and debug your code. this can help