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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.
this guy solved it in 3 to 4 lines but mine was at least 10 line 😂
this is my bruteforce solution and i have learned regex yet so hope at list i have solved problem but may be it is ineficient way :)