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

#define rep(i,n) for(int i=0;i<n;i++)
#define ll long long

bool Ans[10][10];

int main() {
	Ans[0][0] = true; Ans[1][2] = true; Ans[2][1] = true;
	Ans[0][4] = true; Ans[2][4] = true; Ans[3][3] = true; Ans[4][2] = true; Ans[4][0] = true;
	Ans[1][6] = true; Ans[3][6] = true; Ans[4][5] = true; Ans[4][3] = true;
	Ans[3][4] = true; Ans[5][4] = true; Ans[6][3] = true; Ans[6][1] = true;

	int x, y;
	cin >> x >> y;

	if (Ans[(int)abs(x)][(int)abs(y)]) cout << "YES" << endl;
	else cout << "NO" << endl;

	return 0;
}