#include <iostream>
using namespace std;

int main() {
    double s, x, pos = 0, dist = 7;
    cin >> s >> x;
    double L = s - x, R = s + x;

    while (pos < L) {
        pos += dist;
        dist *= 0.98;
    }

    if (pos + dist > R) cout << "n" << endl;
    else cout << "y" <<endl;
    return 0;
}