import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int typeEE = 0;
		int typeEO = 0;
		int typeOE = 0;
		int typeOO = 0;
		for (int i = 0; i < n; i++) {
		    int x =sc.nextInt();
		    int y =sc.nextInt();
		    if (x % 2 == 0) {
		        if (y % 2 == 0) {
		            typeEE++;
		        } else {
		            typeEO++;
		        }
		    } else {
		        if (y % 2 == 0) {
		            typeOE++;
		        } else {
		            typeOO++;
		        }
		    }
		}
		int count = typeEE /2 + typeEO / 2 +  typeOE / 2 + typeOO / 2;
		if (count % 2 == 0) {
		    System.out.println("Bob");
		} else {
		    System.out.println("Alice");
		}
	}
}