import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String[] player = {"oda", "yukiko"};
    String s = sc.next();
    int index = 0;
    if(s.equals("yukiko")) index = 1;
    int stone = 0;
    for(int i = 0; i < 8; i++) {
      String b = sc.next();
      for(int j = 0; j < 8; j++) {
        if(!(b.charAt(j) == '.')) stone++;
      }
    }
    String ans = "";
    if(stone % 2 == 0) {
      ans = player[index];
    } else {
      ans = player[1 - index];
    }
    System.out.println(ans);
  }
}