#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin >> A >> B;
  if (A==B) {
     cout << "Yes" << endl;
  }
  else if (A*B==8 && A+B==6) {
      cout << "Yes" << endl;
  }
  else {
      cout << "No" << endl;
  }
}