input:  from typing import List
  
  def add_two_numbers(a: int, b: int) -> None:
      """Adds two numbers together and prints the result.
      >>> add_two_numbers(5, 7)
      12
      >>> add_two_numbers(-3, 3)
      0
      """
      print(a + b)
  
output:     result = a + b
      print(result)