Horizontal segments: 20-47, 50-72, 74-101, 105-130, 134-157, 161-181, 183-211, 216-239, 245-250, 253-271, 276-299, 303-321, 325-353, 358-381, 385-414, 418-440, 443-472, 476-500, 503-527, 529-553, 556-579, 582-672, 674-699, 701-724