System.out.println("items: ");
	        Random rand = new Random();
	        metode = rand.nextInt(5000);
	        for (int i = 0; i < a.length; i++) {

	        	if (sc.hasNextInt())
	        	a[i] = sc.nextInt();

	        else {
	        	System.out.println("input-output error");
	        	sc.close();
	        	return;
	        	}
	        }
	        sc.close();