import java.util.*;

public class Main {
	public static void main (String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int n = sc.nextInt();
    	int[] counts = new int[4];
    	for (int i = 0; i < n; i++) {
    	    counts[sc.nextInt() % 2 + sc.nextInt() % 2 * 2]++;
    	}
    	int sum = 0;
    	for (int x : counts) {
    	    sum += x / 2;
    	}
    	if (sum % 2 == 0) {
    	    System.out.println("Bob");
    	} else {
    	    System.out.println("Alice");
    	}
	}
}