#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    cin >> N;
    vector<int> A(N);
    int l = 0, r = 0;

    for(int i = 0; i < N; i++) {
        cin >> A[i];
    }
    for(int i = 1; i < N; i++){
        if(i % 2 == 0) r ^= A[i];
        else l ^= A[i];
    }
    if(l == 0) {
        cout << "Bob" << endl;
    }
    else {
        cout << "Alice" << endl;
    }
}