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

class Program
{
    public void Solve()
    {
        string S = Console.ReadLine();
        string[] playerBW = (S == "oda" ? new string[] { "oda", "yukiko" } : new string[] { "yukiko", "oda" });

        int stone = 0;
        string B;
        for (int i = 0; i < 8; i++)
        {
            B = Console.ReadLine();
            stone += B.Count(s => s != '.');
        }

        Console.WriteLine("{0}", (stone % 2 == 0 ? playerBW[0] : playerBW[1]));
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}