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

class Magatro
{
    static void Main()
    {
        string S = Console.ReadLine();
        string[] B = new string[8];
        for(int i = 0; i < 8; i++)
        {
            B[i] = Console.ReadLine();
        }
        int cnt = 0;
        for(int i = 0; i < 8; i++)
        {
            for(int j = 0; j < 8; j++)
            {
                if (B[i][j] != '.')
                {
                    cnt++;
                }
            }
        }
        if ((S == "oda"?0:1+cnt)%2==0)
        {
            Console.WriteLine("oda");
        }
        else
        {
            Console.WriteLine("yukiko");
        }
    }
}