using System;

public class Hello
{
    public static void Main()
    {
        var a = new int[4];
        var n = int.Parse(Console.ReadLine().Trim());
        for (int i = 0; i < n; i++)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var b = int.Parse(line[0]);
            var b2 = int.Parse(line[1]);
            if (b % 2 == 0 && b2 % 2 == 0) a[0]++;
            else if (b % 2 == 0 && b2 % 2 == 1) a[1]++;
            else if (b % 2 == 1 && b2 % 2 == 0) a[2]++;
            else a[3]++;
        }
        Console.WriteLine(getAns(a));

    }
    public static string getAns (int[] a)
    {
        var p = 0;
        for (int i = 0; i < 4; i++)
            p += a[i] / 2;
        return p % 2 == 0 ? "Bob" : "Alice";
    }
}