#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
//---------------------------
using namespace std;
//---------------------------
#define REP(i,n) for(int i = 0; i < (n); i++)
#define P(x) cout << (x) << "\n"
//---------------------------


int main(){
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);

  string s;cin >> s;
  string a = "yukicoder";
  REP(i,9){
    if (s[i] == '?') {
      P(a[i]);
    }
  }

  return 0;
}