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

signed main() {
  string S;
  cin >> S;
  
  string T = "yukicoder";
  for( int i = 0; i < S.size(); i++ ){
    if( S.at(i) == '?' ) cout << T.at(i) << endl;
  }
}