#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
#define INF 1000000001LL
#define LNF 1000000000000000001LL
#define MOD 1000000007LL
#define MAX 502
#define long long long
#define all(x) x.begin(),x.end()
using namespace std;

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

    
    int n;
    cin >> n;

    int grundy = 0;

    for(int i = 0; i<n; i++)
    {
        int x;
        cin >> x;
        if(i&1)
            grundy^=x;
    } 

    if(grundy)
        cout << "Alice" << endl;
    else
        cout << "Bob" << endl;
    return 0;
}