#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

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