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

int cnt[2][2];

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
#ifdef LOCAL
	std::ifstream in("in");
	std::cin.rdbuf(in.rdbuf());
#endif

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