#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000

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


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int X, Y;
	cin >> X >> Y;
	rep(i, 9) rep(j, 9) rep(k, 9) {
		int x = 0, y = 0;
		if (i != 8) {
			x += dx[i];
			y += dy[i];
		}
		if (j != 8) {
			x += dx[j];
			y += dy[j];
		}
		if (k != 8) {
			x += dx[k];
			y += dy[k];
		}
		if (x == X && y == Y) {
			cout << "YES" << endl;
			return 0;
		}
	}
	cout << "NO" << endl;

    return 0;
}