#include <stdio.h>
void main(void){
	long double a , b ;
	scanf("%lle %lle",&a,&b);
	b = b * 60 * 60;
	a *= 1000;
	if(a > b){
		printf("KoD");
	}else if(a < b){
		printf("blackyuki");
	}else{
		printf("same");
	}
}