import java.util.*;

public class Main{
  public static void main(String[] args){
    int i;
    String yuki = "yukicoder";
    String input = new Scanner(System.in).next();
    for(i=0;i<9;i++){
      if(input.charAt(i) == '?')System.out.println(yuki.charAt(i));
    }
  }
}