input: from typing import List
  
  
  def print_unique(my_list: List[int]) -> None:
      """
      Print the unique elements of a given list.
      >>> print_unique([1, 2, 3, 2, 4, 5, 4])
      1
      2
      3
      4
      5
      >>> print_unique([5, 5, 5, 5])
      5
      """
output:     unique_elements = set(my_list)
      for element in sorted(unique_elements):
          print(element)