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