input: 
  def optimize_print_list(numbers: List[int]) -> None:
      """ Optimizes the given python program to print all elements of a list on 
      separate lines.
      >>> optimize_print_list([1, 2, 3, 4, 5, 6])
      1
      2
      3
      4
      5
      6
      """
  
output:     for num in numbers:
          print(num)