public int getIntInput(String promptMessage, String invalidInputMessage){
		int userInput = 0;
		boolean inputInvalid = true;
		while (inputInvalid) {
			System.out.print(promptMessage);
			String response = Main.Scan.next();
			Pattern digitPattern = Pattern.compile("([0-9]+)");
			Matcher digitMatches = digitPattern.matcher(response);
			if (digitMatches.find()) {
				userInput = Integer.parseInt(digitMatches.group(1));
				inputInvalid = false;
			}else{
				System.out.println(invalidInputMessage);
			}
		}
		return userInput;
	}