import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		int[]x = new int[N];
		int[]y = new int[N];
		for(int i = 0; i < N; i++) {
			x[i] = scan.nextInt();
			y[i] = scan.nextInt();
		}
		scan.close();
		int c1 = 0;
		int c2 = 0;
		int c3 = 0;
		int c4 = 0;
		for(int i = 0; i < N; i++) {
			if(x[i] % 2 == 0 && y[i] % 2 == 0) {
				c1++;
			}else if(x[i] % 2 == 0 && y[i] % 2 == 1) {
				c2++;
			}else if(x[i] % 2 == 1 && y[i] % 2 == 0) {
				c3++;
			}else {
				c4++;
			}
		}
		int cnt = c1 / 2 + c2 / 2 + c3 / 2 + c4 / 2;
		if(cnt % 2 == 0) {
			System.out.println("Bob");
		}else {
			System.out.println("Alice");
		}
	}
}