str_1 = "the cow jumped over the moon"
str_2 = "the moon cow jumped over the"

def is_permutation(str_1, str_2):
  str_1 = str_1.replace(" ", "")
  str_2 = str_2.replace(" ", "")

  if len(str_1) != len(str_2):
    return False

  for char in str_1:
    if char in str_2:
      str_2 = str_2.replace(char, "")
  return len(str_2) == 0

print(is_permutation(str_1, str_2))