public static int readInput() {
		int nr = -1;
		do {

			if (scanner.hasNextInt()) {
				nr = scanner.nextInt();
			} else {
				System.out.println("\nTegemist ei ole numbriga.\nPalun sisestage number.\n\n");
				break;
			}
		} while (nr < 0);
		scanner.nextLine(); // read the rest of the line
		return nr;
	}