using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        string s = Console.ReadLine();
        string[] name;
        if (s == "oda")
        {
            name = new string[] { "oda", "yukiko" };
        }
        else
        {
            name = new string[] { "yukiko", "oda" };
        }
        int count = 0;

        for (int i = 0; i < 8; i++)
        {
            string line = Console.ReadLine();
            count += line.Length - line.Replace(".", "").Length;
        }

        Console.WriteLine(name[count % 2]);
        Console.ReadLine();
    }
}