#include<bits/stdc++.h>
using namespace std;
int s,x;
double n=7.0;
int main(){
	cin >>s>>x;
	for(int i=1,n=n/100*98;i<=s+1;i++){
		if(i==s+1) if(x<n){cout <<"y";break;}
		if(i==s+1) if(x>=n){cout <<"n";break;}
	}
	return 0;
}