input: Write a function to combine two strings and reverse the result. The function should take two string inputs and return the reversed combined string.
  
  def reverse_combined_string(words, words2):
      combined = words + words2
      result = combined[::-1]
      return result
  
  assert reverse_combined_string("Hello ", "world!")=="!dlrow olleH"
  assert reverse_combined_string("Good ", "morning!")=="!gninrom dooG"
  assert reverse_combined_string("", "test")=="tset"
  assert reverse_combined_string("short", "")=="trohs"
  assert reverse_combined_string("", "")==""
output: def reverse_combined_string(words, words2):
      combined = words + words2
      result = combined[::-1]
      return result