input: from typing import List
  
  def optimize_printing(numbers: List[int]) -> None:
      """ Optimize the printing of a list of numbers by reducing the number of print statements.
      >>> optimize_printing([1, 2, 3, 4, 5, 6])
      [1, 2, 3, 4, 5, 6]
      """
      
      print(*numbers, sep='\n')
output:     for i in range(0, len(numbers), 5):
          print(*numbers[i:i+5], sep=', ')