!747

m {
  static S question = "Is port 80 open?";

  p {
    if (args.length != 0)
      question = join(" ", args);
    L<S> tok = parse(question);
    //print(structure(tok));
    print("Q: " + question);
    S[] match = match2(parse("is port * open"), tok);
    if (match != null) {
      int port = parseInt(match[0]);
      print("I'll check port " + port + "..."); 
      boolean answer = isPortOpen(port);
      print("A: " + (answer ? "Yes, it is open!" : "No, it is not open."));
    } else
      print("Unknown question: " + join(tok));
  }
  
  static L<S> parse(S s) {
    return tokensToLowerCase(dropPunctuation(javaTokPlusPeriod(s)));
  }
}