using System;
using System.Linq;

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();

        int cnt = 0;
        string ans = "";

        for(int i = 0; i < 8; i++)
        {
            string t = Console.ReadLine();
            for (int j = 0; j < 8; j++)
            {
                if (t[j] != '.') cnt++;
            }
        }

        if (cnt % 2 == 0) ans = s;
        else
        {
            if (s == "oda") ans = "yukiko";
            else ans = "oda";
        }

        Console.WriteLine(ans);
    }
}