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

又是一个回忆的逝去……