#include<bits/stdc++.h> using namespace std; double s, x, w, q = 7; char sum; int main() { cin >> s >> x; while (1 + 1 == 2) { if (w >= s - x) { if (s + x < w + q * 0.98) { sum = 'n'; break; } else { sum = 'y'; break; } } w += q; q *= 0.98; } cout << sum << "\n"; return 0; }