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

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