input: def combine_and_reverse(word1: str, word2: str) -> str:
      """
      Combine two strings and reverse the resulting string.
      
      >>> combine_and_reverse("Hello ", "world!")
      '!dlrow olleH'
      >>> combine_and_reverse("Python", " is awesome!")
      '!emosewa si nohtyP'
      """
      
output:     combined = word1 + word2
      return combined[::-1]