#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define REP(i, n) rep(i, 0, n)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define int long long
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e12;

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    int d[4] = {};
    rep(i, 0, n){
        int a, b;
        cin >> a >> b;
        d[(a % 2) * 2 + b % 2]++;
    }
    int cnt = 0;
    rep(i, 0, 4){
        if(d[i]) cnt += d[i] / 2;
        // cout << d[i] << endl;
    }
    cout << (cnt % 2 ? "Alice" : "Bob") << endl; 
}