input: 
  def sort_strings_by_length(strings: List[str]) -> List[str]:
      """
      Sort a list of strings based on their length.
      
      >>> sort_strings_by_length(["Hello","World!","Good","Morning"])
      ["Good", "Hello", "World!", "Morning"]
      """
      strings.sort(key=len)
      return strings
  
output:     return strings