input: def swap_variables(x: int, y: int) -> tuple:
      """ Swap the values of two given variables and return them as a tuple.
      >>> swap_variables(5, 10)
      (10, 5)
      >>> swap_variables(3, 7)
      (7, 3)
      """
  
output:     x, y = y, x
      return (x, y)