input: 
  def swap_variables(x: any, y: any) -> tuple:
      """ Swaps the values of two variables and returns them as a tuple.
      >>> swap_variables(5, 10)
      (10, 5)
      >>> swap_variables("hello", "world")
      ("world", "hello")
      """
      x, y = y, x
      return x, y
  
output:     x, y = y, x
      return x, y