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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.
to_container explicitly includes conversion header and also config header for compile-time feature checks
Hi.
Kata description: "each character MUST be changed ...".
"opo" isn`t a valid solution for "opp" test case, because it changes only first char in test string.