#include <bits/stdc++.h> #define rep(i, n) for (int i = 0; i < n; ++i) using ll = long long; using namespace std; const int INF = 1e9; int main() { string S, T = "yukicoder"; cin >> S; rep(i, S.size()) { if (S[i] == '?') cout << T[i] << endl; } return 0; }