import java.util.Scanner;
public class no780 {
	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));
	}
}