textlib

function split(sep, st)
  local tab = {}
  local b = ""
  for i=0, #st do
    local let = string.sub(st, i, i)
    if let == sep then
      table.insert(tab, b)
      b = ""
    elseif i == #st then
      b = b..let
      table.insert(tab, b)
      b = ""
    else
      b = b..let
    end
  end
  return tab
end