#include <iostream>
#include <cmath>
using namespace std;

bool solve(int a,int b){
	return (a==2 and b==4) or a==b;
}

int main() {
    int a,b;cin>>a>>b;
    if(a>b)swap(a,b);
    cout<<(solve(a,b)?"Yes":"No")<<endl;
    return 0;
}