public static void last_name() throws IOException, InterruptedException {
		System.out.print("Oh ok " + Main.first_name + ", what's your last name? ");
		Utils.speak("Oh ok " + Main.first_name + ", what's your last name? ");
		Main.last_name = Main.input.nextLine().trim();
		Main.input.next();
		if (Main.last_name == null || Main.last_name == "") {
			Main.last_name = "Unknown";
		}
		Properties_Utils.set_prop("last_name", Main.last_name);
		Main.fullname = Main.first_name + " " + Main.last_name; 
		Main.fullname = Main.fullname.trim();
	}