#include<iostream>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
  string s;
  cin >> s;
  string t="yukicoder";
  if(s[0]=='?'){
    cout<<"y"<<endl;
  }else if(s[1]=='?'){
    cout<<"u"<<endl;
  }else if(s[2]=='?'){
    cout<<"k"<<endl;
  }else if(s[3]=='?'){
    cout<<"i"<<endl;
  }else if(s[4]=='?'){
    cout<<"c"<<endl;
  }else if(s[5]=='?'){
    cout<<"o"<<endl;
  }else if(s[6]=='?'){
    cout<<"d"<<endl;
  }else if(s[7]=='?'){
    cout<<"e"<<endl;
  }else{
    cout<<"r"<<endl;
  }
  return 0;
}