IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
(6, 15, D:1)
  a hobgoblin skeleton
(8, 15, D:1)
  a +0 club
  a goblin skeleton
(10, 0, D:1)
  a rat skeleton
(12, 2, D:1)
  a stone
  a +0 dagger
(13, 23, D:1)
  a +0 club
(14, 27, D:1)
  a +0 club
  a goblin skeleton
(15, 9, D:1)
  a +0 whip
(21, 16, D:1)
  a quokka corpse (skeletalised by now)
(21, 29, D:1)
  a ball python corpse (skeletalised by now)
(22, 30, D:1)
  a +0 dagger
(28, 23, D:1)
  a +0 club
  3 stones
(33, 31, D:1)
  a +0 short sword
(43, 24, D:1)
  a ball python skeleton
(43, 41, D:1)
  a +0 helmet
(45, 32, D:1)
  a ball python corpse (skeletalised by now)
(47, 5, D:1)
  a +0 club
  a goblin skeleton
(48, 21, D:1)
  a hobgoblin skeleton
(54, 14, D:1)
  a +0 short sword
(55, 7, D:1)
  a +0 dagger

Level 2 of the Dungeon
(16, 3, D:2)
  the +4 robe of the Iron City of Dis {Harm Str+2}
    Harm:       It increases damage dealt and taken.
    Str+2:      It affects your strength (+2).
  a rat skeleton
(21, 22, D:2)
  a rat corpse (skeletalised by now)
(23, -2, D:2)
  a +0 mace
(25, 6, D:2)
  a hobgoblin skeleton
(26, 7, D:2)
  an adder skeleton
(27, 11, D:2)
  a +0 leather armour
(34, -8, D:2)
  a +0 scale mail
  3 flux baubles
(34, 25, D:2)
  a +0 club
  a goblin skeleton
(35, 27, D:2)
  a frilled lizard skeleton
(42, 19, D:2)
  8 stones
(48, 16, D:2)
  an adder skeleton
(50, 14, D:2)
  a hobgoblin skeleton
(51, 13, D:2)
  a jackal skeleton

Level 3 of the Dungeon
(0, 0, D:3)
  9 gold pieces
(19, 9, D:3)
  a +0 flail
  a +0 ring mail
  an orc corpse
(19, 10, D:3)
  a +0 short sword
  a +0 ring mail
  a +0 dagger
  a +0 robe
  a +0 short sword
  an orc corpse
  a hobgoblin corpse
(19, 11, D:3)
  a +0 falchion
  a +0 leather armour
(19, 13, D:3)
  a bat corpse
(20, 15, D:3)
  a frilled lizard corpse
(22, 7, D:3)
  5 stones
(22, 9, D:3)
  a quokka corpse
(23, 18, D:3)
  a +0 dagger
  a kobold corpse
(27, 25, D:3)
  a rat corpse