def main():
    N = int(input())
    points = []
    for i in range(N):
       x, y = map(int, input().split()) 
       points.append((x,y))
    #print(points)

    game_count = 0
    flag = True
    while flag == True:
        points = find_erase_points(points)
        if points is None:
            flag = False
        else:
            game_count += 1

    if game_count == 0:
        print("Bob")
    elif game_count % 2 == 1:
        print("Alice")
    else:
        print("Bob")

def find_erase_points(points):
    if len(points) == 0 or len(points) == 1:
        return None

    for (i, point) in enumerate(points):
        x, y = point
        for (j, point2) in enumerate(points):
            x2, y2 = point2
            x_dist = abs(x2 - x)
            y_dist = abs(y2 - y)
            if x_dist == 0 and y_dist == 0:
                continue
            if x_dist % 2 == 0 and y_dist % 2 == 0:
                del points[j]
                del points[i]
                return points
    return None

if __name__ == '__main__':
    main()