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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.
Maybe not in the subject, but I can't solve the problem: the keyboard shortcuts ctrl+c and ctrl+v do not work in codewars.
More precisely, they work differently: ctrl + v to move the cursor to the end. How to fix it?