11868번: 님 게임 2 ↗

#include <bits/stdc++.h>

#define for1(s,n) for(int i = s; i < n; i++)
#define for1j(s,n) for(int j = s; j < n; j++)
#define foreach(k) for(auto i : k)
#define foreachj(k) for(auto j : k)
#define pb(a) push_back(a)
#define sz(a) a.size()

using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef vector <int> iv1;
typedef vector <vector<int> > iv2;
typedef vector <ll> llv1;
typedef unsigned int uint;
typedef vector <ull> ullv1;
typedef vector <vector <ull> > ullv2;


int main() {
  ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	int n, a, b;
	
	cin >> n;
	
	cin >> a;
	
	for1(0, n - 1) {
		cin >> b;
		a ^= b;
	}
	
	cout << (a == 0 ? "cubelover" : "koosaga");
}