input: 
  def optimize_for_loop(numbers: List[int]) -> None:
      """
      Optimize the given for-loop to print each number in the list.
      Instead of using a for loop, the solution should use the print function 
      with unpacking and separator.
      
      >>> optimize_for_loop([1, 2, 3, 4, 5, 6])
      """
  
output:     print(*numbers, sep='\n')