#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main() {
	int x, y;
	cin >> x >> y;

	int dx[] = { 0, 1, 2, -1, -2, 1, 2, -1, -2 }, dy[] = { 0, 2, 1, 2, 1, -2, -1, -2, -1 };

	for(int i = 0; i < 9; i++) {
		for(int j = 0; j < 9; j++) {
			for(int k = 0; k < 9; k++) {
				int xx = dx[i] + dx[j] + dx[k];
				int yy = dy[i] + dy[j] + dy[k];
				if(x == xx && y == yy) {
					cout << "YES" << endl;
					return 0;
				}
			}
		}
	}
	cout << "NO" << endl;
}