input: def auto_complete(dictionary, prefix):
      """Given a list of words as dictionary and a string 'prefix',
      return the list of words that start with 'prefix'.
      
      >>> auto_complete(["dog", "deer", "deal", "dungeon", "dark", "dusk"], "d")
      ['dog', 'deer', 'deal', 'dungeon', 'dark', 'dusk']
      """
output:     return [word for word in dictionary if word.startswith(prefix)]