using System;
using System.Linq;
class Program {
    static void Main() {
        string name = Console.ReadLine();
        int dotCnt = 0;
        for (int i = 0; i < 8; i++) {
            dotCnt += Console.ReadLine().Count(x => x == '.');
        }
        Console.WriteLine(name == "oda" ^ dotCnt % 2 == 0 ? "yukiko" : "oda");
    }
}