#include <iostream>
#include <string>

const std::string yuki = "yukicoder";

void solve() {
    for (int i = 0; i < 9; ++i) {
        char c;
        std::cin >> c;
        if (c == '?') std::cout << yuki[i] << std::endl;
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}