input: Write a function to combine two strings and reverse the result in Python. The function should take two input strings, concatenate them, and then reverse the concatenated string. Return the reversed string.
  
  
  def combine_and_reverse(words, words2):
      combined = words + words2
      result = combined[::-1]
      return result
  
  assert combine_and_reverse("Hello ", "world!") == "!dlrow olleH"
  assert combine_and_reverse("Python", " programming") == "gnimmargorp nohtyP"
  assert combine_and_reverse("", "coding") == "gnidoc"
  assert combine_and_reverse("test", "") == "tset"
  assert combine_and_reverse("", "") == ""
  
output: def combine_and_reverse(words, words2):
      combined = words + words2
      result = combined[::-1]
      return result