class Program
    {
        static void Main(string[] args)
        {
            string firstMove = Console.ReadLine();
            string secondMove = "";
            if(firstMove == "oda")
            {
                secondMove = "yukiko";
            }
            else
            {
                secondMove = "oda";
            }
                int notCount = 0;
            for(int i = 0; i < 8; i++)
            {
                string line = Console.ReadLine();
                notCount += NotAvailable(line);
            }

            if (notCount%2 == 0)
            {
                Console.WriteLine(firstMove);
            }
            else
            {
                Console.WriteLine(secondMove);
            }
        }

        private static int NotAvailable(string line)
        {
            int count = 0;
            for(int i = 0;i < 8; i++)
            {
                if (line[i] == '.')
                {
                    count++;
                }
            }
            return count;
        }
    }