#include <bits/stdc++.h>
using namespace std;

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