IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 short sword
  a kobold skeleton
(0, 12, D:1)
  a +0 chain mail
(2, 25, D:1)
  a +0 chain mail
(2, 26, D:1)
  a +0 club
  a goblin skeleton
(2, 30, D:1)
  a quokka skeleton
(4, 35, D:1)
  a rat skeleton
(5, 18, D:1)
  a +0 robe
(5, 29, D:1)
  a +0 dagger
(10, 14, D:1)
  a bat skeleton
(10, 15, D:1)
  a +0 club
(12, 17, D:1)
  a +0 robe
(19, 12, D:1)
  a +0 dagger
(21, 36, D:1)
  a +0 dagger
  a goblin corpse (skeletalised by now)
  a quokka corpse (skeletalised by now)
(25, 4, D:1)
  a frilled lizard skeleton
(25, 7, D:1)
  a +0 dagger
  a +0 ring mail
  a goblin skeleton
(25, 12, D:1)
  a +0 whip
(26, 7, D:1)
  a frilled lizard skeleton
(26, 13, D:1)
  a +0 ring mail
(26, 16, D:1)
  a jackal skeleton
(27, 4, D:1)
  a quokka skeleton
(29, 3, D:1)
  a jackal corpse (skeletalised by now)
(32, 4, D:1)
  a jackal corpse (skeletalised by now)
  a jackal corpse (skeletalised by now)
(34, 7, D:1)
  3 stones
(38, 3, D:1)
  a bat skeleton
(39, 3, D:1)
  a +0 club
  3 stones
(40, 3, D:1)
  a +0 club
  a goblin skeleton
(41, 22, D:1)
  3 stones
(51, 35, D:1)
  a rat skeleton

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 short sword
  2 stones
  a kobold corpse (skeletalised by now)
(0, 14, D:2)
  a stone
(15, 29, D:2)
  4 poisoned darts
(33, 39, D:2)
  a frilled lizard skeleton
(34, -4, D:2)
  a +0 short sword
  2 stones
(41, 26, D:2)
  a quokka skeleton
(42, 38, D:2)
  a +0 long sword
(43, 40, D:2)
  a jackal skeleton
(48, 20, D:2)
  a frilled lizard skeleton
(51, 40, D:2)
  a +0 club

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 dagger
  a kobold skeleton
(9, -7, D:3)
  a +0 club
  a +0 club
  a +0 chain mail
  a +0 hand axe
  a +0 chain mail
  an orc corpse
  an orc corpse
(17, 15, D:3)
  a quokka corpse (skeletalised by now)
(20, 25, D:3)
  a +0 sling