using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static long NN => long.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var ee = 0;
        var eo = 0;
        var oe = 0;
        var oo = 0;
        for (var i = 0; i < n; ++i)
        {
            var c = NList;
            if (c[0] % 2 == 0 && c[1] % 2 == 0) ++ee;
            if (c[0] % 2 == 0 && c[1] % 2 == 1) ++eo;
            if (c[0] % 2 == 1 && c[1] % 2 == 0) ++oe;
            if (c[0] % 2 == 1 && c[1] % 2 == 1) ++oo;
        }
        var t = ee / 2 + eo / 2 + oe / 2 + oo / 2;
        if (t % 2 == 0) WriteLine("Bob");
        else WriteLine("Alice");
    }
}