static L<S> sendToAll(S botName, S line, Object... args) {
  new L<S> answers;
  
  line = format3(line, args);
  
  for (DialogIO io : talkToAll(botName))
    try {
      print(": " + dropAfterLastSlash(io.readLine()));
      answers.add(io.askLoudly(line));
    } finally {
      io.close();
    }

  return answers;
}

static L<S> sendToAll(S line) {
  ret sendToAll("", line);
}