input: 
  def create_html_form(action_url: str, method: str, button_value: str) -> str:
      """ Generate an HTML form with a submit button.
      
      >>> create_html_form("action.py", "post", "Submit")
      '<form action="action.py" method="post"><input type="submit" value="Submit"></form>'
      >>> create_html_form("submit_form.cgi", "get", "Send")
      '<form action="submit_form.cgi" method="get"><input type="submit" value="Send"></form>'
      """
  
output:     return f'<form action="{action_url}" method="{method}"><input type="submit" value="{button_value}"></form>'