#include <iostream>

using namespace std;

int main()
{
	double s=0, x=0;
	cin >> s >> x;
	double a = s - x, b = s + x;
	double k = 7;
	double fish = 7;

	while (fish < a) {
		k *= 0.98;
		fish += k;
	}
	k *= 0.98;
	fish += k;
	if (fish >= a && fish <= b) {
		cout << 'n';
	}
	else {
		cout << 'y';
	}

	return 0;
}