public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Input four-digit number:");
        int x = sc.nextInt();
        int a = x/1000;
        int b = x%1000 / 100;
        int c = x%100/10;
        int d = x%10/1;
        if (a + b == c + d)
            System.out.println("It's a lucky ticket!!");
        else
            System.out.println("Sorry, your lose");

        }
    }