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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.
I tested your code and it returns wrong output for the input:
A man, a plan, a canal - Panama(Returnsfalse). You must remove all non-alphanumeric characters, including all symbols and spaces. This challenge lacks tests.nicely done :)
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