import java.util.Arrays;
import java.util.Scanner;

public class Main{
	static Scanner s=new Scanner(System.in);
	static int gInt(){
		return s.nextInt();
	}
	public static void main(String[]$){
		int n=gInt();
		int[]c=new int[4];
		for(int i=0;i<n;++i) {
			int x=gInt(),y=gInt();
			x=x%2*2;
			y=y%2;
			++c[x+y];
		}
		int sum=Arrays.stream(c).map(i->i/2).sum();
		System.out.println(sum%2==0?"Bob":"Alice");
	}
}