using System;

public class Program {
    public static void Main() {
        string name = Console.ReadLine();
        int stones = 0;
        for (int i = 0; i < 8; i++) {
            string line = Console.ReadLine();
            for (int j = 0; j < 8; j++) {
                if (line[j] != '.') stones++;
            }
        }
        if (stones % 2 == 0) {
            Console.WriteLine(name);
        } else {
            if (name == "oda") {
                Console.WriteLine("yukiko");
            } else {
                Console.WriteLine("oda");
            }
        }
    }
}