#include<bits/stdc++.h>
using namespace std;
using ll = long long;
// #define rep(i,m,n) for(int i=m; i<n; ++i)
// #define repl(i,m,n) for(ll i=m; i<n; ++i)
#define rep(i,m,n) for(ll i=m; i<n; ++i)
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()

int main(){
    ll A, B;
    cin >> A >> B;

    if(A == B){
        cout << "Yes" << endl;
    }else if((A == 2 && B == 4) || (A == 4 && B == 2)){
        cout << "Yes" << endl;
    }else{
        cout << "No" << endl;
    }
    return 0;
}