IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 leather armour
(17, -33, D:1)
  a +0 plate armour
(19, -7, D:1)
  a +0 whip
  5 stones
(23, -20, D:1)
  a +0 short sword
(39, -20, D:1)
  a +0 short sword
(56, -41, D:1)
  a +0 robe
(58, -6, D:1)
  a +0 dagger
  3 stones

Level 2 of the Dungeon
(4, -2, D:2)
  a +0 robe
(10, -19, D:2)
  a +0 ring mail
(12, -16, D:2)
  a +0 mace
(34, -17, D:2)
  a +0 dagger
(35, 35, D:2)
  a +0 scale mail
(36, 1, D:2)
  5 stones
(43, -15, D:2)
  a +0 sling
(51, -18, D:2)
  a +0 sling

Level 3 of the Dungeon
(0, 0, D:3)
  5 stones
(3, -14, D:3)
  a +0 robe
(5, -13, D:3)
  a +0 club
(6, -1, D:3)
  a +0 ring mail
(11, -21, D:3)
  a +0 dagger
(13, -41, D:3)
  4 stones
(17, -39, D:3)
  a +0 great sword
(18, -39, D:3)
  a +0 club
(20, -33, D:3)
  a +0 dagger
(22, -23, D:3)
  a +0 short sword
(24, -15, D:3)
  a rat corpse (skeletalised by now)
(25, -23, D:3)
  6 stones
(25, -15, D:3)
  a quokka corpse (skeletalised by now)
(26, -18, D:3)
  a +0 hand axe
  a +0 animal skin
(29, 4, D:3)
  a +0 dagger
  3 stones
  a +0 leather armour
(31, -30, D:3)
  a +0 falchion
(31, -25, D:3)
  a +0 club
(31, -23, D:3)
  a +0 whip
  a +0 whip
(32, -19, D:3)
  a +0 halberd
(33, -22, D:3)
  a +0 giant club

Level 4 of the Dungeon
(3, -8, D:4)
  a +0 shortbow
(4, -4, D:4)
  a +0 club
  a +0 dagger
  a +0 robe
(13, -6, D:4)
  4 poisoned darts
(18, -5, D:4)
  a +0 club
(28, 11, D:4)
  a +0 short sword (still there?)
  8 poisoned darts (still there?)
  a kobold corpse (still there?)
(32, 10, D:4)
  a +0 spear
  a gnoll corpse
(32, 11, D:4)
  a giant cockroach corpse
(33, 10, D:4)
  a +0 club
  a gnoll corpse
(35, 9, D:4)
  a +0 club
  4 stones
(38, -17, D:4)
  a +0 dagger
  a goblin corpse
(49, -4, D:4)
  a +0 robe