#include<iostream>
using namespace std;
int s,x;
double v=7,sum; 
int main(){
	cin>>s>>x;
	while(1){
		sum+=v;
		if(sum>=s-x){
			if(sum<=s+x){
				if(sum+v*0.98>s+x){
					cout<<"n";
				}else{
					cout<<"y";
				}
			}else{
				cout<<"n";
			}
			break;
		}
		v*=0.98;
	}
	return 0;
}

大佬快来，笨小孩要起哭了。