#include<bits/stdc++.h>
using namespace std;
int main(){
	int s,x,v=7;
	double l=0;
	cin>>s>>x;
	while(l<s-x){
		v*=0.98;
		l+=v;
	}
	v*=0.98;
	if(l+v>s+x) cout<<"n";
	else cout<<"y";
	return 0;
}