import java.util.Scanner;

public class Yukicoder88 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String name = sc.next();
		String b;
		int count = 0;
		for (int i = 0; i < 8; i++) {
			b = sc.next();
			for (int j = 0; j < 8; j++) {
				if (b.charAt(j) != '.') count++;
			}
		}
		if (name.equals("oda")) {
			if (count % 2 == 0)
				System.out.println("oda");
			else
				System.out.println("yukiko");
		} else {
			if (count % 2 == 0)
				System.out.println("yukiko");
			else
				System.out.println("oda");
		}

	}
}