using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Scanner
{
    private readonly char Separator = ' ';
    private int Index = 0;
    private string[] Line = new string[0];
    public string Next()
    {
        if (Index >= Line.Length)
        {
            Line = Console.ReadLine().Split(Separator);
            Index = 0;
        }
        var ret = Line[Index];
        Index++;
        return ret;
    }

    public int NextInt()
    {
        return int.Parse(Next());
    }

    public long NextLong()
    {
        return long.Parse(Next());
    }

    public string[] StringArray()
    {
        Line = Console.ReadLine().Split(Separator);
        Index = Line.Length;
        return Line;
    }

    public int[] IntArray()
    {
        var l = StringArray();
        var res = new int[l.Length];
        for (int i = 0; i < l.Length; i++)
        {
            res[i] = int.Parse(l[i]);
        }
        return res;
    }

    public long[] LongArray()
    {
        var l = StringArray();
        var res = new long[l.Length];
        for (int i = 0; i < l.Length; i++)
        {
            res[i] = long.Parse(l[i]);
        }
        return res;
    }
}

struct P
{
    public int X, Y;
    public P(int x, int y)
    {
        X = x;
        Y = y;
    }
}
class Program
{
    private int N;
    private P[] XY;
    private void Scan()
    {
        var sc = new Scanner();
        N = sc.NextInt();
        XY = new P[N];
        for (int i = 0; i < N; i++)
        {
            int x = sc.NextInt();
            int y = sc.NextInt();
            XY[i] = new P(x, y);
        }
    }

    public void Solve()
    {
        Scan();
        int a = 0;
        int b = 0;
        int c = 0;
        int d = 0;
        foreach (var i in XY)
        {
            if (i.X % 2 == 0)
            {
                if (i.Y % 2 == 0)
                {
                    a++;
                }
                else
                {
                    b++;
                }
            }
            else
            {
                if (i.Y % 2 == 0)
                {
                    c++;
                }
                else
                {
                    d++;
                }
            }
        }
        var cnt = (a / 2) + (b / 2) + (c / 2) + (d / 2);
        Console.WriteLine(cnt % 2 == 0 ? "Bob" : "Alice");
    }

    static void Main(string[] args)
    {
        new Program().Solve();
    }
}