IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 mace
(3, -6, D:1)
  6 stones
(4, -17, D:1)
  a +0 ring mail
(9, -29, D:1)
  a stone
(9, -28, D:1)
  a stone
(10, -28, D:1)
  2 stones
(11, -31, D:1)
  a stone
(11, -29, D:1)
  a stone
(11, -28, D:1)
  a stone
(11, -27, D:1)
  a stone
(12, -31, D:1)
  a stone
(12, -28, D:1)
  4 stones
(13, -31, D:1)
  3 stones
(13, -30, D:1)
  4 stones
(13, -28, D:1)
  2 stones
(13, -27, D:1)
  a stone
(14, -31, D:1)
  3 stones
(14, -30, D:1)
  4 stones
(14, -29, D:1)
  2 stones
(14, -27, D:1)
  3 stones
(15, -31, D:1)
  3 stones
(15, -29, D:1)
  a stone
(16, -29, D:1)
  2 stones
(16, -28, D:1)
  2 stones
(17, -30, D:1)
  a stone
(17, -28, D:1)
  a stone
(21, -19, D:1)
  4 stones
  a +0 flail
(21, 3, D:1)
  a +0 dagger
(31, -30, D:1)
  a +0 club
(33, -27, D:1)
  a +0 club
(34, -4, D:1)
  a +0 short sword
(38, 0, D:1)
  a +0 quarterstaff
(45, -1, D:1)
  a +0 club

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 whip
(9, 15, D:2)
  a +0 giant club
(11, 6, D:2)
  a stone
(13, -6, D:2)
  a +0 robe
(13, 22, D:2)
  8 stones
(14, 7, D:2)
  a +0 sling
(22, 16, D:2)
  8 stones
(36, 5, D:2)
  a +0 dagger
(42, 18, D:2)
  a +0 robe
(47, 18, D:2)
  2 stones

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 long sword
(28, 0, D:3)
  a +0 dagger of pain
(28, 15, D:3)
  a +0 club
(36, -5, D:3)
  a +0 short sword
(38, 15, D:3)
  8 stones
(43, 22, D:3)
  a +0 club

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 dagger
(1, 24, D:4)
  a +0 sling
(7, -5, D:4)
  4 stones
(12, -12, D:4)
  a +0 sling
(20, -20, D:4)
  8 gold pieces
  a +0 club
  a stone
(27, 19, D:4)
  a +0 dagger
(28, -20, D:4)
  6 gold pieces
  a +0 dagger