/* -*- coding: utf-8 -*-
 *
 * 1556.cc:  No.1556 Power Equality - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int a, b;
  scanf("%d%d", &a, &b);
  if (a > b) swap(a, b);

  if (a == b || (a == 2 && b == 4)) puts("Yes");
  else puts("No");
  return 0;
}