IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 sling
(3, -9, D:1)
  a +0 sling
(14, 4, D:1)
  a rat skeleton
(14, 8, D:1)
  a +0 dagger
  a bat skeleton
(15, -18, D:1)
  a frilled lizard skeleton
(22, -2, D:1)
  a +0 club
  a kobold skeleton
(26, -7, D:1)
  a ball python skeleton
(27, -7, D:1)
  a +0 mace
(34, -17, D:1)
  a hobgoblin skeleton
(34, -16, D:1)
  a hobgoblin skeleton
(38, 25, D:1)
  a hobgoblin skeleton
(46, -4, D:1)
  a +0 short sword
  a kobold corpse (skeletalised by now)

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 ring mail
(11, 0, D:2)
  a +0 mace
  a +0 scale mail
(12, -4, D:2)
  a +0 dagger
(15, 0, D:2)
  a +0 ring mail
(16, -20, D:2)
  a +0 dagger
  a +0 dagger
  a goblin corpse
(17, -20, D:2)
  a +0 club
  a +0 dagger
(19, -20, D:2)
  a +0 dagger
(22, -19, D:2)
  a +0 dagger
(29, -24, D:2)
  a ball python corpse
(30, -17, D:2)
  a +0 club
  a goblin skeleton