input: from typing import List, Tuple
  
  def combine_and_reverse(strings: Tuple[str, str]) -> str:
      """ Combine two strings and reverse the result.
      >>> combine_and_reverse(('Hello ', 'world!'))
      '!dlrow olleH'
      """
      combined = strings[0] + strings[1]
      return combined[::-1]
output:     combined = strings[0] + strings[1]
      return combined[::-1]