#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <stack>
#include <cmath>
#include <queue>
#include <numeric>


int main()
{
	int n;
	int oo, ee, oe, eo; // o=奇数, e=偶数

	std::cin >> n;

	oo = ee = oe = eo = 0;

	for (size_t i = 0; i < n; i++)
	{
		int a, b;

		std::cin >> a >> b;

		if (a % 2 == 0) {
			if (b % 2 == 0) {
				ee++;
			}
			else {
				eo++;
			}
		}
		else {
			if (b % 2 == 0) {
				oe++;
			}
			else {
				oo++;
			}
		}
	}

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

	if (total % 2 == 0) {
		std::cout << "Bob" << std::endl;
	}
	else {
		std::cout << "Alice" << std::endl;
	}
	
	return 0;
}