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

int main()
{
    int N;
    int cnt[4] = {};
    cin >> N;
    while(N--) {
        int x, y;
        cin >> x >> y;
        if(x % 2 == 0) {
            if(y % 2 == 0) cnt[0]++;
            else cnt[1]++;
        } else{
            if(y % 2 == 0) cnt[2]++;
            else cnt[3]++;
        }
    }

    if((cnt[0] / 2 + cnt[1] / 2 + cnt[2] / 2 + cnt[3] / 2) % 2 == 0) {
        cout << "Bob" << endl;
    } else {
        cout << "Alice" << endl;
    }

    return (0);
}