local ifs = {
  a = peripheral.wrap("front"),
  b = peripheral.wrap("back"),
  c = peripheral.wrap("left"),
  d = peripheral.wrap("right")
}

local pos = {
  a = {p = "a", s = "WEST"},
  b = {p = "a", s = "UP"},
  c = {p = "a", s = "DOWN"},
  d = {p = "b", s = "EAST"},
  e = {p = "b", s = "UP"},
  f = {p = "b", s = "DOWN"},
  g = {p = "c", s = "NORTH"},
  h = {p = "c", s = "UP"},
  i = {p = "c", s = "DOWN"},
  j = {p = "d", s = "SOUTH"},
  k = {p = "d", s = "UP"},
  l = {p = "d", s = "DOWN"},
  m = {p = "d", s = "WEST"},
  n = {p = "c", s = "EAST"}
}

local essentia = {
  arbor = "8003e0e23f094ccea997e06935a7f768",
  herba = "1c288c94a8a1868d12b5842efa3ad6af",
  telum = "3b3b1614a2b9152dcbf2b884ded1e3fc",
  terra = "bb9211b894dea99a6b674ebe63759333",
  aer = "64630f917da3a7214b1ef2c91a90d090",
  meto = "438d48d3ad9a71d7c74b740d9af0d498",
  iter = "e02b869d0f5fae947df6187fa86c89ff",
  aqua = "358c318e194980b0c0835a9f1ce41750",
  ordo = "a77c4b35bbb1a4c84b15122dd52354bf",
  metallum = "07275fa65074555c50144eeaadcaa369",
  perditio = "18add493aeeb97a3fe71cf8130fe8675",
  vitreus = "047206f1fafce8cdc716c9c822b1d2cb",
  pannus = "7adcf7ebaa90cc8cbb52edde554d096b",
  tutamen = "7efe695fcc02157c8d6b336a22951b18",
  alienis = "f4822536f3c421b0c4f7976181d1614d",
  fabrico = "4bd51093dae3a8de9f013bdbb9f38e5b",
  praecantatio = "b06b63e28f76cf46121ac7ac9f195242"
}

function sendItem(letter, item)
  ifs[pos[letter].p].exportItem(item, pos[letter].s, 1)
end

function addEssentia(name, amount)
  ifs[pos["n"].p].exportItem({id = "Thaumcraft:ItemCrystalEssence", nbt_hash = essentia[name]}, pos["n"].s, amount)
end