#include <iostream>
using namespace std;

int main() {
	int N, x, y, sum = 0, tmp[4] = {0};
	cin >> N;
	for (int i = 0; i < N; ++i) {
		cin >> x >> y;
		if (x % 2 == 0 && y % 2 == 0) ++tmp[0];
		else if (x % 2 == 0 && y % 2) ++tmp[1];
		else if (x % 2 && y % 2 == 0) ++tmp[2];
		else ++tmp[3];
	}
	for (int i = 0; i < 4; ++i) sum += tmp[i] / 2;
	if (sum % 2) cout << "Alice";
	else cout << "Bob";
}