#include<bits/stdc++.h>

using namespace std;

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