#include "iostream"
#include "climits"
#include "list"
#include "queue"
#include "stack"
#include "set"
#include "functional"
#include "algorithm"
#include "string"
#include "map"
#include "iomanip"
#include "cmath"

using namespace std;

const long long int MOD = 1000000007;

long long int N, M, K, H, W, L, R;


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

	cin >> N;
	vector<pair<int, int>>v(N);
	int num[4] = {};
	for (int i = 0; i < N; i++) {
		cin >> v[i].first >> v[i].second;
		if (v[i].first % 2 && v[i].second % 2) {
			num[0] ++;
		}
		if (v[i].first % 2==0 && v[i].second % 2) {
			num[1] ++;
		}
		if (v[i].first % 2 && v[i].second % 2==0) {
			num[2] ++;
		}
		if (v[i].first % 2==0 && v[i].second % 2==0) {
			num[3] ++;
		}
	}
	for (int i = 0; i < 4; i++) {
		M += num[i] / 2;
	}
	if (M % 2) {
		cout << "Alice\n";
	}
	else {
		cout << "Bob\n";
	}
	return 0;
}