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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.
The string.lower() function is actually needed as the instructions stated that having one lower-case and one-upper case letter in the string is not an isogram.
yes, you are right
Thank you!