#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0, i##_len = (n); i < i##_len; i++)
#define reps(i, s, n) for(ll i = (s), i##_len = (n); i < i##_len; i++)
#define rrep(i, n) for(ll i = (n) - 1; i >= 0; i--)
#define rreps(i, e, n) for(ll i = (n) - 1; i >= (e); i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((ll)(x).size())
#define len(x) ((ll)(x).length())

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    // ifstream in("input.txt");
    // cin.rdbuf(in.rdbuf());
    ll n;
    cin >> n;
    vector<vector<ll>> cnt(2, vector<ll>(2, 0));
    rep(i, n) {
        ll x, y;
        cin >> x >> y;
        cnt[x % 2][y % 2]++;
    }
    ll turn = 0;
    rep(i, 2) rep(j, 2) turn += cnt[i][j] / 2;
    cout << ((turn % 2 == 0) ? "Bob" : "Alice") << endl;
    return 0;
}