#include <stdio.h>

int memo[13][13];

int main(void) {
	int x, y;
	scanf("%d%d", &x, &y);
	
	int dx[8] = {-2, -1, +1, +2, -2, -1, +1, +2};
	int dy[8] = {+1, +2, +2, +1, -1, -2, -2, -1};
	
	int n;
	memo[6][6] = 1;
	for(n = 0; n < 3; n++) {
		int i, j;
		for(j = 0; j < 13; j++) {
		for(i = 0; i < 13; i++) {
			if(memo[i][j] == n + 1) {
				int k;
				for(k = 0; k < 8; k++) {
					memo[ i + dx[k] ][ j + dy[k] ] = n + 2;
				}
			}
		}
		}
	}
	
	printf("%s\n", (-6 <= x && x <= 6 && -6 <= y && y <= 6 && memo[x + 6][y + 6]) ? "YES" : "NO");
	
	return 0;
}