#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#ifdef LOCAL
#include <algo/debug.h>
#else
#define debug(...) void(0)
#endif
#include<atcoder/all>
using namespace atcoder;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int A, B; cin >> A >> B;
    if(A == B) cout << "Yes" << endl;
    else {
        if((A == 2 && B == 4) || (A == 4 && B == 2)) cout << "Yes" << endl;
        else cout << "No" << endl;
    }
}