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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  int a, b;
  cin >> a >> b;

  string ans = "No";
  if (a == b)  ans = "Yes";
  if (a==2 && b==4) ans = "Yes";
  if (a==4 && b==2) ans = "Yes";
  cout << ans << endl;


}