defmodule Union do
  require Base

  def set1(data) do
    arg1
  end

  def set2(data) do
    linkv
  end

  def union do
    #union of set1 and set2 comes here
end

[1, 2, 3, 4, 5, 6]

[8, 4, 5, 6, 7, 8]

def union(set1, set2) do
  set1(set1) ++ set2(set2)
end