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

double sum,x=7,a,b,y;

int main(){
	cin>>a>>b;
	for(int i=1;sum<=a;i++){
		sum+=x;
		x=x*0.98;
	}
	y=b-sum+a;
	if(b+y>sum+x*0.98){
		cout<<"y";
	}
	else{
		cout<<"n";
	}
}