#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    int a, b;
    cin >> a >> b;
    if (a > b) swap(a, b);
    if (a == b || (a == 2 && b == 4)) cout << "Yes" << endl;
    else cout << "No" << endl;

    return 0;
}