#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
	ll x, y;
	cin >> x >> y;
	int dx[] = { -2,-2,-1,-1,1,1,2,2,0 };
	int dy[] = { -1,1,-2,2,-2,2,-1,1,0 };
	for (int i = 0;i < 9;i++) {
		for (int j = 0;j < 9;j++) {
			for (int k = 0;k < 9;k++) {
				if (x == dx[i] + dx[j] + dx[k] && y == dy[i] + dy[j] + dy[k]) {
					cout << "YES" << endl;
					return 0;
				}
			}
		}
	}
	cout << "NO" << endl;

	return 0;
}