import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		long a = sc.nextInt();
		long b = sc.nextInt();
		sc.close();

		a *= 1000;
		b *= 3600;
		if (a == b) {
			System.out.println("same");
		} else if (a > b) {
			System.out.println("KoD");
		} else {
			System.out.println("blackyuki");
		}
	}
}