using System;
using System.Collections.Generic;
using System.Text;

class Program
{
    public void Proc()
    {
        Reader.IsDebug = false;
        string sente = Reader.ReadLine();

        int isiCount = 0;
        for (int i = 0; i < 8; i++)
        {
            string inpt = Reader.ReadLine();
            foreach (char c in inpt)
            {
                if (c != '.')
                {
                    isiCount++;
                }
            }
        }

        string ans = sente;
        if (isiCount % 2 != 0)
        {
            if(sente.Equals("oda")) {
                ans = "yukiko";
            } else{
                ans = "oda";
            }
        }
        Console.WriteLine(ans);
    }



    public class Reader
    {
        public static bool IsDebug = true;
        private static String PlainInput = @"


yukiko
........
....w...
..wwww..
..wbww..
..bbbwb.
.b.bb.w.
........
........




 
";
        private static System.IO.StringReader Sr = null;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (Sr == null)
                {
                    Sr = new System.IO.StringReader(PlainInput.Trim());
                }
                return Sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
        public static int[] GetInt(char delimiter = ' ', bool trim = false)
        {
            string inptStr = ReadLine();
            if (trim)
            {
                inptStr = inptStr.Trim();
            }
            string[] inpt = inptStr.Split(delimiter);
            int[] ret = new int[inpt.Length];
            for (int i = 0; i < inpt.Length; i++)
            {
                ret[i] = int.Parse(inpt[i]);
            }
            return ret;
        }
    }
    static void Main()
    {
        Program prg = new Program();
        prg.Proc();
    }
}