IndexError

Level 1 of the Dungeon
(15, 9, D:1)
  a +0 club
  a +0 club
  a +0 dagger
(20, 33, D:1)
  a +0 short sword
(28, 41, D:1)
  a +0 short sword
(32, 1, D:1)
  8 stones
(43, 23, D:1)
  a +0 club
(47, 25, D:1)
  a +0 short sword
(54, 14, D:1)
  a +0 dagger
(54, 16, D:1)
  a +0 dagger

Level 2 of the Dungeon
[Shop] Ackev's Weapon Boutique
  a +0 short sword (39 gold)
  a +0 trident (45 gold)
  a stone (1 gold)
  a +0 sling (19 gold)
  a +0 sling (19 gold)
  a +0 war axe (45 gold)
  6 stones (7 gold)
  the +6 short sword "Qoibeoko" {flame, rElec rPois Str+3} (778 gold)
    Str:       It affects your strength (+3).
    rElec:     It insulates you from electricity.
    rPois:     It protects you from poison.
(0, 0, D:2)
  a hobgoblin corpse (skeletalised by now)
(7, -5, D:2)
  6 stones
(8, 8, D:2)
  5 stones
(16, 0, D:2)
  2 stones
  a +0 whip
(18, -10, D:2)
  a +0 club
(22, -5, D:2)
  9 stones
(25, 19, D:2)
  a +0 short sword
(33, 8, D:2)
  a +0 battleaxe
(38, 16, D:2)
  8 stones
(43, 10, D:2)
  3 poisoned darts

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 dagger
  a goblin corpse
(5, -14, D:3)
  a giant cockroach corpse
(7, -8, D:3)
  a +0 whip
  a gnoll corpse
(7, -7, D:3)
  a throwing net {=f, !d}
(9, -7, D:3)
  a +0 halberd
  4 stones
  a gnoll corpse
(11, -7, D:3)
  a +0 whip
  a gnoll corpse

Level 4 of the Dungeon
[Shop] Emafap's Overcharged Wands
  a wand of mindburst (30) (630 gold)
  a wand of iceblast (18) (648 gold)
  a wand of polymorph (18) (378 gold)
  a wand of digging (11) (693 gold)
  a wand of digging (11) (693 gold)
  a wand of quicksilver (18) (1134 gold)
(0, 0, D:4)
  a scroll of identify
(6, -9, D:4)
  a +0 club
  a goblin corpse
(6, -7, D:4)
  a hobgoblin corpse
(14, 8, D:4)
  a +0 rapier
(19, 14, D:4)
  9 stones
(23, -3, D:4)
  a +0 hand axe
  a +0 whip
  a +0 short sword
  an orc corpse (skeletalised by now)
(27, -1, D:4)
  a +0 short sword
  a stone
(29, -1, D:4)
  a +0 flail
  an orc corpse (skeletalised by now)