#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[7][7];

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

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

	if (abs(x) > 6 || abs(y) > 6)cout << "NO" << endl;
	else if (Ans[abs(x)][abs(y)]) cout << "YES" << endl;
	else cout << "NO" << endl;

	return 0;
}