input: 
  def print_sorted_strings(strings: List[str]) -> None:
      """
      Takes a list of strings as input and prints the strings in alphabetical order.
  
      >>> print_sorted_strings(['cat', 'dog', 'apple', 'banana'])
      apple
      banana
      cat
      dog
      """
  
output:     sorted_strings = sorted(strings)
      for s in sorted_strings:
          print(s)