input: def create_html_form():
      """ Create an HTML form with a submit button to send information to a Python program.
      >>> print(create_html_form())
      <form action="action.py" method="post">
          <input type="submit" value="Submit">
      </form>
      """
      return '''<form action="action.py" method="post">
          <input type="submit" value="Submit">
      </form>'''
output:     return '''<form action="action.py" method="post">
          <input type="submit" value="Submit">
      </form>'''