import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskA solver = new TaskA();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskA {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int oddodd = 0;
            int oddeven = 0;
            int evenodd = 0;
            int eveneven = 0;
            for (int i = 0; i < n; i++) {
                int x, y;
                x = in.nextInt();
                y = in.nextInt();
                if (x % 2 == 0 && y % 2 == 0) eveneven++;
                else if (x % 2 == 0 && y % 2 == 1) evenodd++;
                else if (x % 2 == 1 && y % 2 == 0) oddeven++;
                else oddodd++;
            }
            int cnt = oddodd / 2 + oddeven / 2 + eveneven / 2 + evenodd / 2;
            if (cnt % 2 == 0) {
                out.println("Bob");
            } else out.println("Alice");
        }

    }
}