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

int main() {
    int N;
    cin >> N;
    vector<int>A(N);
    int sum = 0;
    for(int i = 0; i < N; i++) {
        cin >> A[i];
        if(i%2 == 1) {
            sum ^= A[i];
        }
    }
    cout << ((sum == 0)?"Bob":"Alice") << endl;
}