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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var vs = new string[2];
            vs[0] = Console.ReadLine();
            vs[1] = vs[0] == "oda" ? "yukiko" : "oda";
            int sum = 0;
            for (int i = 0; i < 8; i++)
            {
                sum += Console.ReadLine().Count(c => c == '.');
            }
            Console.WriteLine(sum % 2 == 0 ? vs[0] : vs[1]);
            Console.ReadLine();
        }
    }
}