k-permutations of n in haskell

k-permutations of n in haskell via monads and recursion https://en.wikipedia.org/wiki/Permutation https://gist.github.com/evgenii-malov/8474b42c5c449c7fadf5a84a7cd6885e ... https://www.youtube.com/watch?v=U9FSaCNp__4