#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;

int main() {
  string S; cin >> S;
  string ans = "yukicoder";
  for(int i = 0; i < (int)S.size(); i++){
    if(S[i] != ans[i]) cout << ans[i] << endl;
  }
}