import java.util.Scanner;
class Main{
	public static void main(String[]$){
		Scanner s=new Scanner(System.in);
		int c[]=new int[4],i;
		for(i=s.nextInt();i>0;--i)
			++c[s.nextInt()%2*2+s.nextInt()%2];
		System.out.println((c[0]/2+c[1]/2+c[2]/2+c[3]/2)%2==0?"Bob":"Alice");
	}
}