#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ul = unsigned long;

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

	int n;
	cin >> n;

	int oo{ 0 }, oe{ 0 }, ee{ 0 }, eo{ 0 };
	for (int i = 0; i < n; ++i)
	{
		int x, y;
		cin >> x >> y;

		if (x & 1)
			y & 1 ? ++oo : ++oe;
		else
			y & 1 ? ++eo : ++ee;
	}

	int nn = oo / 2 + oe / 2 + ee / 2 + eo / 2;

	string res = (nn & 1 ? "Alice" : "Bob");
	cout << res << "\n";

	return 0;
}