input: Write a python function to find all permutations of a given string.
  assert sorted(find_permutations("abc")) == sorted(["abc", "acb", "bac", "bca", "cab", "cba"])
  assert sorted(find_permutations("dog")) == sorted(["dog", "dgo", "odg", "ogd", "gdo", "god"])
  assert sorted(find_permutations("123")) == sorted(["123", "132", "213", "231", "312", "321"])
output: def find_permutations(s):
      from itertools import permutations
      return [''.join(p) for p in permutations(s)]