using System;

public class Hello
{
    public static void Main()
    {
        var F = Console.ReadLine().Trim();
        var S = F == "oda" ? "yukiko" : "oda";
        var count = 0;
        for (int i = 0; i < 8; i++)
        {
            var s = Console.ReadLine().Trim();
            count += 8 - s.Replace(".", "").Length;
        }
        Console.WriteLine(count % 2 == 0 ? F : S);
    }
}