#include <cmath>
#include<iostream>
using namespace std;
int main() {
    int X,Y;
    cin >> X >> Y;
    int loser=0;
 
   if (X>Y) {
       Y+=3;
       if (Y>X) {
           std::cout<<"Yes"<<endl;
       }
       else {
           std::cout<<"No"<<endl;
       }
 
   }
    else{
        X+=3;
        if (X>Y) {
            std::cout<<"Yes"<<endl;
        }
        else {
            std::cout<<"No"<<endl;
        }
 
    }
 
    return 0;
}
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