package no88;

import java.util.Scanner;

public class Main {
	public static final String[] NAME = {"oda","yukiko"};
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		int stones = 0;
		for(int i=0;i<8;i++) {
			String l = sc.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]);
	}

}