IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
(1, -17, D:1)
  a +0 dagger
(11, 0, D:1)
  a +0 dagger
  4 stones
(12, 15, D:1)
  a +0 club
(14, 0, D:1)
  a +0 short sword
  a stone
(15, -17, D:1)
  a +0 club
(16, -10, D:1)
  a +0 spear
(20, 2, D:1)
  a +0 club
(43, -7, D:1)
  a +0 sling
(43, 0, D:1)
  a +0 club
(44, 1, D:1)
  a +0 whip

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 leather armour
(5, 8, D:2)
  a +0 ring mail
(15, 11, D:2)
  a +0 dagger
(19, 21, D:2)
  a +0 hammer
(20, 27, D:2)
  5 stones
(37, -10, D:2)
  5 large rocks
(37, 15, D:2)
  a +0 club
(38, 22, D:2)
  a +0 robe
(39, 19, D:2)
  a +1 dagger of speed
(42, -3, D:2)
  6 poisoned darts
(42, 1, D:2)
  a +0 dagger
(42, 21, D:2)
  a +0 dagger
(43, -11, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(54, -17, D:2)
  a frilled lizard corpse