INSERT IGNORE INTO snakes (head, tail) VALUES
(16, 6),
(47, 26),
(49, 11),
(56, 53),
(62, 19),
(64, 60),
(87, 24),
(93, 73),
(95, 75),
(98, 78);

INSERT IGNORE INTO ladders (bottom, top) VALUES
(2, 38),
(7, 14),
(8, 31),
(15, 26),
(21, 42),
(28, 84),
(36, 44),
(51, 67),
(71, 91),
(78, 98),
(87, 94);