#include<bits/stdc++.h>
using namespace std;
double a,b,j,k=7,u;
int main(){
	cin>>a>>b;
	a-=b;
	u=a;
	b*=2;
	while(j<=a)
	{
		j+=k;
		k*=0.98;
	}
	a+=b;
	k*=0.98;
	if(j+k>=a)
	{
		cout<<"n";
	}
	if(j+k<=u)
	{
		cout<<"y";
	}
}

60分