import java.util.*;

public class Exercise136{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    String s = sc.next();
    String b = "yukiko";
    String w = "oda";
    if(s.equals("oda")){
      b = "oda";
      w = "yukiko";
    }
    int count = 0;
    for(int i = 0; i < 8; i++){
      String l = sc.next();
      char[] la = l.toCharArray();
      for(char each : la){
        if(each != '.'){
          count++;
        }
      }
    }
    System.out.println((count % 2 == 0) ? b : w);
  }
}