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

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();
        string field = "";
        for(int i = 0; i < 8; i++)
        {
            field += Console.ReadLine();
        }
        if(field.ToCharArray().Count(c => c == '.') % 2 == 0)
        {
            if(s == "oda")
            {
                Console.WriteLine($"oda");
            }
            else
            {
                Console.WriteLine($"yukiko");
            }
        }
        else
        {
            if(s != "oda")
            {
                Console.WriteLine($"oda");
            }
            else
            {
                Console.WriteLine($"yukiko");
            }
        }
    }
}