input: 
  def optimize_program(numbers: List[int]) -> None:
      """ Optimize the given program to print each number in the list on a new line.
      >>> optimize_program([1, 2, 3, 4, 5, 6])
      1
      2
      3
      4
      5
      6
      """
  
output:     for num in numbers:
          print(num)