#!/usr/bin/env ruby

require 'zipf'
require 'trollop'

def main
  conf = Trollop::options do
    opt :f, "f files", :type => :string, :required => true
    opt :e, "e files", :type => :string, :required => true
  end
  
  f_files = conf[:f].split
  e_files = conf[:e].split
  
  h = {}
  f_files.each_with_index { |fn,i|
    fa = ReadFile.readlines_strip fn 
    ea = ReadFile.readlines_strip e_files[i]
    fa.each_with_index { |fw,j|
      if h.has_key? fw
        h[fw] << ea[j]
      else
        h[fw] = [ea[j]]
      end
    }
  }
  
  h.each_pair { |f,ea|
    puts "#{f}\t#{ea.first}" 
  } 
end

main