input: Write a python function to determine if two given strings are rotations of each other.
  assert are_Rotations("abc","cba") == False
  assert are_Rotations("abcd","cdba") == False
  assert are_Rotations("abacd","cdaba") == True
output: def are_Rotations(str1, str2):
      if len(str1) != len(str2):
          return False
      temp = str1 + str1
      return str2 in temp