#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a, b; cin >> a >> b; 
    if (a > b) swap(a, b);
    if (a == b || (a == 2 && b == 4)) cout << "Yes" << '\n';
    else cout << "No" << '\n';
    return 0;
}