#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, a, b) for (ll i = a; i < b; i++)
#define rrep(i, a, b) for (ll i = a; i >= b; i--)
using mint = modint1000000007;
void chmin(ll &x, ll y) { x = min(x, y); }
void chmax(ll &x, ll y) { x = max(x, y); }

int main() {
   cin.tie(0);
   ios_base::sync_with_stdio(false);

  ll A, B; cin >> A >> B;
  if(A>B) swap(A,B);
  if(A==B || ( A==2 && B== 4 ) ) cout << "Yes"<< endl;
  else cout << "No" << endl;

   return 0;
}