#include <bits/stdc++.h>
using namespace std;
int main()
{
	double sum=0,s=7.0,n,x;
	int cnt=0;
	cin >> n >> x;
	while(sum<=x+n)
	{
		if(sum>=n-x)
		{
			cnt++;
		}
		s*=0.98;
		sum+=s;
	}
	if(cnt>1)	cout << 'y' << endl;
	else	cout << 'n' << endl;
	return 0;
}