#include "bits/stdc++.h"
using namespace std;

bool DP[13][13] = {};
int dx[8] = { -2, -2, -1, -1, 1, 1, 2, 2 }, dy[8] = { -1, 1, -2, 2, -2, 2, -1, 1 };

void DFS(int N, int X, int Y) {
	DP[X][Y] = true;
	if (N == 0) return;
	for (int i = 0; i < 8; i++) {
		DFS(N - 1, X + dx[i], Y + dy[i]);
	}
}

int main() {
	int X, Y;
	cin >> X >> Y;
	if (abs(X) > 6 || abs(Y) > 6) {
		cout << "NO" << endl;
		return 0;
	}
	X += 6, Y += 6;
	DFS(3, 6, 6);
	if (DP[X][Y]) cout << "YES" << endl;
	else cout << "NO" << endl;
}