#include <vector>
#include <string>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <map>
#include <set>
#include <memory.h>
using namespace std;
int n;
int a[200];
int gcd(int a, int b){
    return b ? gcd(b, a % b) : a;
}
int main(){
    cin>>n;
for(int i = 0; i < n; ++i)
     scanf("%d",& a[i]);
    int res = a[0];
    for(int i = 1; i <= n - 1; ++i){
        res = gcd(res,a[i]);
    }
    for(int i = 0; i < n; ++i)
        a[i] /= res;
    sort(a, a + n);
    int ans = a[n - 1] - n;
    if(ans % 2) cout << "Alice";
    else cout<<"Bob";
}