using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static string[] SList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => ReadLine()).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var s = ReadLine();
        var map = SList(8);
        var count = 0;
        foreach (var si in map) foreach (var c in si) if (c != '.') ++count;
        if (s == "oda")
        {
            WriteLine(count % 2 == 0 ? "oda" : "yukiko");
        }
        else
        {
            WriteLine(count % 2 == 0 ? "yukiko" : "oda");
        }
    }
}