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