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

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;
}