IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
(5, 13, D:1)
  a +0 dagger
(15, -15, D:1)
  a +0 dagger
(16, 9, D:1)
  a +0 great mace
(22, 4, D:1)
  a +0 ring mail
(26, 21, D:1)
  2 stones
  a +0 whip
(33, 20, D:1)
  a +0 spear
(34, 19, D:1)
  a +0 dagger
  3 stones
(35, 3, D:1)
  2 stones
(36, 4, D:1)
  a +0 leather armour
(41, 10, D:1)
  a +0 club
(43, -15, D:1)
  a +0 ring mail
(48, -3, D:1)
  6 poisoned darts
(56, 13, D:1)
  a +0 robe

Level 2 of the Dungeon
(0, 0, D:2)
  a rat corpse
(6, -2, D:2)
  a frilled lizard skeleton
(6, 13, D:2)
  a frilled lizard skeleton
(12, 33, D:2)
  a +0 dagger
(20, 18, D:2)
  a +0 short sword
  a kobold corpse
(25, 30, D:2)
  a +0 club
  2 stones
(26, 5, D:2)
  5 stones
(32, 25, D:2)
  a +0 dagger
  a +0 plate armour
(32, 34, D:2)
  2 stones
(36, 28, D:2)
  9 stones
(37, 10, D:2)
  a +0 club
(40, 19, D:2)
  a +0 dagger

Level 3 of the Dungeon
(0, 0, D:3)
  a hobgoblin corpse