using System;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        // No.88 次はどっちだ

        string sente = Console.ReadLine();
        char[] banmen;
        int stoneCnt = 0;

        for (int i = 0; i < 8; i++)
        {
            banmen = Console.ReadLine().ToCharArray();

            for (int j = 0; j < banmen.Length; j++)
                if (banmen[j] != '.') stoneCnt++;
        }

        if (stoneCnt % 2 == 1)
            if ("oda".Equals(sente))
                Console.WriteLine("yukiko");
            else
                Console.WriteLine("oda");
        else
            Console.WriteLine(sente);

    }
}