#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

int main(){
  ll A,B; cin >> A >> B;
  if(A > B) swap(A,B);
  if(A == 2 && B == 4) cout << "Yes\n";
  else if(A == B) cout << "Yes\n";
  else cout << "No\n";
  return 0;
}

struct ios_do_not_sync{
  ios_do_not_sync(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
  }
} ios_do_not_sync_inst;