input: 
  def sort_strings_alphabetically(string_list: List[str]) -> None:
      """ Takes a list of strings and prints them in alphabetical order.
      >>> sort_strings_alphabetically(['cat', 'dog', 'apple', 'banana'])
      apple
      banana
      cat
      dog
      """
  
output:     string_list.sort()
      for s in string_list:
          print(s)