#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
    ll A, B;
    cin >> A >> B;
    A *= 1000;
    B *= 3600;
    if(A < B) {
        cout << "blackyuki" << endl;
    }
    if(A > B) {
        cout << "KoD" << endl;
    }
    if(A==B) {
        cout << "same" << endl;
    }
}