#include<iostream>
#include<vector>

using namespace std;

struct  Point
{
	int x, y;
};

int main() {

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

	return 0;
}