#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    ll A,B; cin >> A >> B;
    A *= 1000;
    B *= 60 * 60;
    if(A > B)
        cout << "KoD";
    if(A < B)
        cout << "blackyuki";
    if(A == B)
        cout << "same";
    cout << endl;
}