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

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		
		long[][] count = new long[2][2];
		
		for(int i = 0; i < N; i++){
			final int x = sc.nextInt();
			final int y = sc.nextInt();
			
			count[y % 2][x % 2]++;
		}
		
		long all = 0;
		for(final long[] cs : count){
			for(final long c : cs){
				all += (c * (c - 1)) / 2;
			}
		}
		
		System.out.println(all % 2 == 0 ? "Bob" : "Alice");
		
	}
}