func_code_string: #include <bits/stdc++.h>   using namespace std;   long long x, a[] = {3, 15, 81, 6723, 50625, 2562991875LL};   int sg[] = {0, 1, 2, 0, 3, 1, 2}, n, ans = 0;   int main() {     cin >> n;     while (n--) {       cin >> x;       ans ^= sg[lower_bound(a, a + 6, x) - a];     }     cout << (ans ?  Furlo  :  Rublo ) << endl;     return 0;   }   