IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 robe
(18, 31, D:1)
  4 boomerangs
(21, -2, D:1)
  a +0 spear
(29, 14, D:1)
  a +0 club
(30, 12, D:1)
  8 stones
(33, 17, D:1)
  a +0 dagger
(57, -3, D:1)
  a +0 war axe

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 short sword
  3 stones
  a kobold corpse (skeletalised by now)
(2, 15, D:2)
  a +0 robe
(3, 17, D:2)
  a +0 ring mail
(6, -7, D:2)
  a hobgoblin corpse (skeletalised by now)
(10, -5, D:2)
  a +0 dagger
(11, 10, D:2)
  a +0 long sword
(13, 15, D:2)
  a +0 ring mail
(15, 24, D:2)
  a +0 short sword
(16, -1, D:2)
  a +0 hand axe
(25, 10, D:2)
  6 stones
(26, 3, D:2)
  a +0 whip
(26, 8, D:2)
  an adder corpse (skeletalised by now)
(27, -12, D:2)
  a +0 spear
(28, 20, D:2)
  a +0 robe
(29, 27, D:2)
  a rat corpse (skeletalised by now)
(30, -14, D:2)
  5 stones
(32, 17, D:2)
  a +0 dagger
(36, 3, D:2)
  a +0 club