input: 
  def string_to_list(s1: str, s2: str) -> list:
      """
      Generate a list of all the words in both input strings.
      
      >>> string_to_list("I want to make a difference", "The journey to success is long")
      ["I", "want", "to", "make", "a", "difference", "The", "journey", "to", "success", "is", "long"]
      """
      s1_list = s1.split()
      s2_list = s2.split()
      output_list = s1_list + s2_list
      return output_list
  
output:     s1_list = s1.split()
      s2_list = s2.split()
      output_list = s1_list + s2_list
      return output_list