#!/usr/bin/env ruby

require 'zipf'

f1 = ReadFile.new ARGV[0]
f2 = ReadFile.new ARGV[1]

d1 = {}
d2 = {}
a1 = []
a2 = []

while line1 = f1.gets
  line1.strip!

  line2 = f2.gets
  if line2 == nil then line2 = "" end
  line2.strip!
  
  if !d1.include? line1 and !d2.include? line2
    a1 << line1
    a2 << line2
  end

  d1[line1] = true
  d1[line2] = true
end

o1 = WriteFile.new ARGV[0]+".out"
o2 = WriteFile.new ARGV[1]+".out"

a1.each_with_index { |line1,i|
  o1.write line1 + "\n"
  o2.write a2[i] + "\n"
}