/* -*- coding: utf-8 -*-
 *
 * 2050.cc:  No.2050 Speed - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int a, b;
  scanf("%d%d", &a, &b);

  ll amh = (ll)a * 1000;
  ll bmh = (ll)b * 3600;

  if (amh > bmh) puts("KoD");
  else if (amh < bmh) puts("blackyuki");
  else puts("same");
  return 0;
}