Original hmm ... I don't think codewars has a storage limit or disk limit for more <10kb datas . Anyway , from what i know base theme of Codewars is practice makes perfect . so having completed many katas that requires sort list with different keys will help to practice . People can always ignore them if they think they are on high level . And he made this kata and cases ( better than copying from sites ) so i think discouraging him is a bad idea . maybe he can create some awesome kata's in future