#include<bits//stdc++.h>
using namespace std;
int main(){
    long long a,b;cin >> a>>b;
    if(a==b)cout <<"Yes" <<endl;
    else if(a==2&&b==4) cout <<"Yes" <<endl;
    else if(b==2&&a==4) cout <<"Yes" <<endl;
    else cout <<"No" <<endl;
}