import java.util.Scanner;

class Main {
    public static void main(String[] args) throws Exception {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        String[] name = {"oda", "yukiko"};
        int stones = 0;
        for(int i=0; i<8; i++) {
            String l = in.next();
            for(int j=0; j<8; j++) {
                if(l.charAt(j) != '.') {
                    stones++;
                }
            }
        }
        int turn = s.equals(name[0]) ? 0 : 1;
        System.out.println(name[(turn+stones)%2]);
    }
}