#include <iostream>
#include <vector>

using namespace std;

int main() {
	int n, x, y;
	cin >> n;

	vector<int> types(4, 0);
	for (int i = 0; i < n; i++) {
		cin >> x >> y;
		types[x % 2 * 2 + y % 2]++;
	}

	int pairs = 0;
	for (auto z : types) {
		pairs += z / 2;
	}

	cout << (pairs % 2 == 1 ? "Alice" : "Bob") << endl;
	return 0;
}