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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.
!0 === !!1 === false!0is shorterit's a wrong solution if a test string contains digits or whitespaces (non-letters).
example: "lowercase 567 UPPERCASEE"
this string contains more uppercase letters, but with your solution it will be converted to lowercase.