#include<bits/stdc++.h>
using namespace std;

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