input: 
  def create_html_form(action_url: str) -> str:
      """ Generates an HTML form with a submit button that submits information to
      a given Python program via a POST request.
      >>> create_html_form("action.py")
      '<form action="action.py" method="post">\n    <input type="submit" value="Submit">\n</form>'
      """
  
output:     return f'<form action="{action_url}" method="post">\n    <input type="submit" value="Submit">\n</form>'