// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input
    string S;
    cin >> S;

    // Output
    const string key = "yukicoder";
    rep(i, 9) if (S[i] != key[i]) cout << key[i] << endl;
}