#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  string s;
  cin>>s;
  string b="yukicoder";
  for(Int i=0;i<(Int)s.size();i++)
    if(s[i]=='?') cout<<b[i]<<endl;
  return 0;
}