#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    int n;
    cin >> n;

    int p[2][2] = {};
    for (int i = 0; i < n; i++) {
        int x, y;
        cin >> x >> y;

        p[x % 2][y % 2]++;
    }

    int s = 0;
    for (int i = 0; i < 4; i++) {
        s += p[0][i] / 2;
    }

    cout << (s % 2 == 0 ? "Bob" : "Alice") << endl;

    return 0;
}