import java.util.PriorityQueue;
import java.util.Scanner;
public class Main {
static int n,x,a;
public static void main(String[] args) {
Scanner cin=new Scanner(System.in);
n=cin.nextInt();
a=0;
for(int i=0;i<n;i++){
x=cin.nextInt();
a^=x;
}
if(a==0){
System.out.println("Bob");
}
else{
System.out.println("Alice");
}
}
}