input: 
  def auto_complete(dictionary, prefix):
      """ Given a list of words (dictionary) and a prefix, this function returns a list
      of words that start with the given prefix.
      Example:
      >>> auto_complete(["dog", "deer", "deal", "dungeon", "dark", "dusk"], "d")
      ['dog', 'deer', 'deal', 'dungeon', 'dark', 'dusk']
      >>> auto_complete(["apple", "apricot", "banana", "blueberry"], "ap")
      ['apple', 'apricot']
      """
  
output:     return [word for word in dictionary if word.startswith(prefix)]