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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.
tu prueba esta mal, estás pasando
([1, 2, 3], [3, 4, 5])(un tuple con dos listas) a la función. La función está duplicando cada elemento del tuple (cada lista) Por eso lo que te salió fue cada lista duplicada ([1, 2, 3] * 2 = [1, 2, 3, 1, 2, 3])Please read this: https://docs.codewars.com/training/troubleshooting and particularly this: https://docs.codewars.com/training/troubleshooting#expected-the-same