import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt(); // 時速 A km
		int b = sc.nextInt(); // 秒速 B m
		
		// 時速何m の形に変える
		double aMeter = a * 1000;
		double bMeterPerHour = b * 60 * 60;
		
		if (aMeter > bMeterPerHour) {
			System.out.println("KoD");
			
		} else if (aMeter < bMeterPerHour) {
			System.out.println("blackyuki");
			
		} else {
			System.out.println("same");
		}
		
		sc.close();
	}
}