#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int A, B;
    cin >> A >> B;

    if(A == B) cout << "Yes" << endl;
    else if(A == 4 && B == 2) cout << "Yes" << endl;
    else if(A == 2 && B == 4) cout << "Yes" << endl;
    else cout << "No" << endl;

    return 0;
}