#include <iostream>

using namespace std;

double s, x, n = 7, lc;
int main()
{
	cin >> s >> x;
	while(lc < s - x){
		lc += n;
		n *= 0.98;
	}
	if(n * 0.98 < lc - (s + x)){
		cout << "y";
	}
	else{
		cout << "n";
	}
	return 0;
}