#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001



int main(){
	
	long long a,b;
	cin>>a>>b;
	b *= 3600;
	a *= 1000;
	if(a>b)cout<<"KoD"<<endl;
	else if(b>a)cout<<"blackyuki"<<endl;
	else cout<<"same"<<endl;
	
	return 0;
}