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

int main(){
    int n, v = 0, v2;
    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> v2;
        if(i & 1)v ^= v2;
    }
    cout << (v ? "Alice" : "Bob") << endl;
}