#include <iostream>
using namespace std;

int N; 

int main() {
    cin.tie(0); ios::sync_with_stdio(false);
    cin >> N;
    int p[4] = {0, 0, 0, 0};
    for (int j = 0; j < N; ++j) {
        int x, y; cin >> x >> y;
        ++p[2*(x%2)+y%2];
    }

    int v = p[0]/2 + p[1]/2 + p[2]/2 + p[3]/2;
    cout << (v % 2 == 1 ? "Alice" : "Bob") << endl;
    return 0;
}