#!/usr/bin/env ruby

require 'zipf'

a = ReadFile.new ARGV[0]
b = ReadFile.new ARGV[1]
min = ARGV[2].to_i
max = ARGV[3].to_i

a_out = WriteFile.new ARGV[0]+".out"
b_out = WriteFile.new ARGV[1]+".out"

while line = a.gets
  line1 = b.gets
  len = line.strip.split.size
  len1 = line1.strip.split.size
  if len >= min and len1 >= min and len <= max and len1 <= max
    a_out.write line
    b_out.write line1
  end
end

a.close
b.close
a_out.close
b_out.close