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

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            int put = 0;
            for (int i = 0; i < 8; i++)
            {
                string a = Console.ReadLine();
                for (int j = 0; j < 8; j++)
                {
                    if (a[j] != '.') put++;
                }
            }
            Console.WriteLine((s == "oda") == (put % 2 == 0) ? "oda" : "yukiko");
        }
    }
}