private int readUserChoise() {
		boolean flag = false;
		int choise = -1;
		System.out.println(menu);

		while (!flag) {
			try {
				choise = input.nextInt();
				flag = true;
			} catch (NumberFormatException e) {
				System.out.println("Worng input, please try again:");
			} catch (NoSuchElementException e) {
				System.out.println("Worng input, please try again:");
			}
		}
		return choise;
	}