input: def return_two_values() -> tuple:
      """
      Demonstrates multiple ways to return two values from a Python function.
      >>> return_two_values()
      ('ABC', 123)
      """
      value1 = "ABC"
      value2 = 123
      return (value1, value2)
output:     value1 = "ABC"
      value2 = 123
      return (value1, value2)