Horizontal segments: 36-72, 75-106, 114-146, 160-196, 200-231, 236-273, 277-308, 312-343, 351-381, 387-419, 436-467, 472-502, 504-538, 540-571, 585-616, 618-655, 676-708, 715-745, 746-782, 786-818