input: Write a function to describe how to return two values from a Python function. Name the function as `return_two_values`. It should return a string and an integer.
  assert return_two_values()==('ABC', 123)
  assert get_multi_values()==('XYZ', 456)
  assert get_multi_values()==('LMN', 789)
  assert get_multi_values()==('', 0)
  assert get_multi_values()==(None, None)
output: def return_two_values():
      return 'ABC', 123