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

int main() {
	int n, a[2][2]{};
	cin >> n;
	for (int i = 0; i < n; i++) {
		int x, y;
		cin >> x >> y;
		a[x % 2][y % 2]++;
	}
	int sum = 0;
	for (int i = 0; i < 2; i++) {
		for (int j = 0; j < 2; j++) {
			sum += a[i][j] / 2;
		}
	}
	cout << (sum % 2 ? "Alice" : "Bob") << endl;
	return 0;
}