// yukicoder: No.240 ナイト散歩
// 2019.4.15 bal4u

#include <stdio.h>

#define BASE 10
typedef struct { int x, y, s; } Q;
Q q[1000]; int top, end;
int mv[8][2] = {{-2,-1},{-2,1},{-1,-2},{-1,2},{1,-2},{1,2},{2,-1},{2,1}};
char map[20][20];

int main()
{
	int i, x, y, s, xx, yy, ans;

	q[0].x = BASE, q[0].y = BASE, q[0].s = 0, top = 0, end = 1;
	while (top != end) {
		x = q[top].x, y = q[top].y, s = q[top++].s;
		if (map[x][y]) continue;
		map[x][y] = 1;
		if (s == 3) continue;
		for (i = 0; i < 8; i++) {
			xx = x + mv[i][0], yy = y + mv[i][1];
			if (!map[xx][yy]) q[end].x = xx, q[end].y = yy, q[end++].s = s + 1;
		}
	}
	scanf("%d%d", &x, &y);
	x += BASE, y += BASE;
	ans = 0;
	if (x >= 0 && y >= 0 && x <= 20 && y <= 20) ans = map[x][y];
	puts(ans ? "YES" : "NO");
	return 0;
}