#include<stdio.h>
int main()
{
	long long int a, b;
	scanf("%lld %lld", &a, &b);
	a *= 1000;
	b *= 3600;
	if (a > b)
		printf("KoD\n");
	else if (a < b)
		printf("blackyuki\n");
	else
		printf("same\n");
	return 0;
}