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

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		int[] cnt = new int[4];
		for(int i=0;i<N;i++){
			cnt[((X[i] & 1) << 1) + (Y[i] & 1)]++;
		}
		
		int tot = cnt.Select(v => v / 2).Sum();
		Console.WriteLine(tot % 2 == 0 ? "Bob" : "Alice");
		
	}
	int N;
	int[] X,Y;
	public Sol(){
		N = ri();
		X = new int[N];
		Y = new int[N];
		for(int i=0;i<N;i++){
			var d = ria();
			X[i] = d[0]; Y[i] = d[1];
		}
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(char sep=' '){return Console.ReadLine().Split(sep);}
	static int[] ria(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>int.Parse(e));}
	static long[] rla(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>long.Parse(e));}
	static double[] rda(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>double.Parse(e));}
}