#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;
}