#include <bits/stdc++.h>

#define show(x) cerr << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz=" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}


constexpr ll MOD = 1e9 + 7;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int N;
    cin >> N;
    vector<ll> num(4, 0);
    for (int i = 0; i < N; i++) {
        ll x, y;
        cin >> x >> y;
        const int ind = (x % 2) * 2 + (y % 2);
        num[ind]++;
    }
    ll sum = 0;
    for (int i = 0; i < 4; i++) {
        sum += num[i] / 2;
    }
    cout << (sum % 2 == 0 ? "Bob" : "Alice") << endl;


    return 0;
}