#include <bits/stdc++.h>
#include <math.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

#define V vector<ll>
#define Vb vector<bool>
#define Vs vector<string>
#define INF 1LL << 60
template <typename T>
bool chmax(T &a, const T& b) {
  if (a < b) {
    a = b;  // aをbで更新
    return true;
  }
return false;
}
template <typename T>
bool chmin(T &a, const T& b) {
  if (a > b) {
    a = b;  // aをbで更新
    return true;
  }
  return false;
}

long long combi(long long n, long long k) {
  if (n == k || k == 0)
    return 1;
  else {
    return combi(n - 1, k - 1) + combi(n - 1, k);
  }
}


//int di[] = {-1,0,1,0};
//int dj[] = {0,-1,0,1};
//cout << fixed << setprecision(15) << y << endl;

/*各桁の和
 int wa(int n){
  int sum =0;
  while(n>0){
    sum += n%10;
    n/=10;
  }
  return sum;
}
*/
/*階乗
 int ki(int i){
   int k = 1;
   for(int j = 1; j<=i; j++){
     k *= j;
   }
   return k;
 }
*/

//vector<int> dx = {1,0,-1,0,1,-1,-1,1};
//vector<int> dy = {0,1,0,-1,1,1,-1,-1};
//int dx[4] = { 0, 1, 0, -1 }, dy[4] = { -1, 0, 1, 0 };







int main(){
  ll a, b;
  cin >> a >> b;
  ll a2 = a*1000;
  ll b2 = b*3600;
  if(a2 > b2) cout << "KoD" << endl;
  else if(a2 == b2) cout << "same" << endl;
  else cout << "blackyuki" << endl;

  return 0;
}