import java.util.Scanner;
public class Main {
	public static void main(String[]args) {
		Scanner sc = new Scanner(System.in);
		int a,b = 0;
		a = sc.nextInt();
		b = sc.nextInt();
		a++;
		if(a <= b) {
			System.out.println("YSE");
		}else {
			System.out.println("NO");
		}
		System.out.println(Math.abs(a - b));
	}
}