#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <math.h>

using ll = long long;
using namespace std;

const int MOD = 1e9+7;

int main() {
    int N;
    cin >> N;
    int group[2][2] = {0};
    for(int i = 0; i < N; i++)
    {
        int x, y;
        cin >> x >> y;
        group[x%2][y%2]++;
    }
    int k = 0;
    k += group[0][0] / 2;
    k += group[0][1] / 2;
    k += group[1][0] / 2;
    k += group[1][1] / 2;
    cout << (k%2==0?"Bob":"Alice") << endl;
    return 0;
}