#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001


int main() {
	
	int n;
	cin>>n;
	vector<int> a(n);
	int cur = 0;
	rep(i,n){
		cin>>a[i];
		if(i%2==1)cur ^= a[i];
	}
	if(cur==0)cout<<"Bob"<<endl;
	else cout<<"Alice"<<endl;
	
    return 0;
}