input: 
  def autocomplete(input_text):
      """
      Generate an autocomplete system that predicts words based on the input text.
      >>> autocomplete("hel")
      ['hello', 'help', 'helm', 'helper', 'helmet']
      >>> autocomplete("app")
      ['apple', 'application', 'appreciate', 'appendix', 'appetite']
      >>> autocomplete("py")
      ['python', 'pyramid', 'pyjama', 'pyromania', 'pythagoras']
      """
  
output:     words = ['hello', 'help', 'helm', 'helper', 'helmet', 'apple', 'application', 'appreciate', 'appendix', 'appetite', 'python', 'pyramid', 'pyjama', 'pyromania', 'pythagoras']
      return [word for word in words if word.startswith(input_text)]