input: from typing import List
  
  
  def combine_and_reverse_strings(words: List[str]) -> str:
      """ Combine two strings into one and reverse the result.
      >>> combine_and_reverse_strings(["Hello ", "world!"])
      '!dlrow olleH'
      """
output:     combined_string = ''.join(words)
      return combined_string[::-1]