In this kata you have to create all permutations of a non empty input string and remove duplicates, if present. This means, you have to shuffle all letters from the input in all possible orders.
Examples:
이문젠데 , 감이 안잡힌다.. 내일 더생각해보고 모르면 풀이를 봐야할듯하다.
ex) 'abc' 3! => abc
acb
bac
bca
cab
cba