#!/usr/bin/env ruby

class Anagram
  attr_accessor :file

  def initialize
    @data = Hash.new {|hash, key| hash[key] = []}
    self
  end

  def process
    @file.each_line do |line|
      word = line.strip!
      key = word.split("").sort!.join
      @data[key] << word
    end
    self
  end

  def output
    return @output if @output
    @output = ""
    @data.each do |key, words|
      next unless words.length > 1
      @output << words.join(" ") << "\n"
    end
    @output
  end
end

if __FILE__ == $0
  a = Anagram.new
  a.file = File.open(ARGV.first)
  puts a.process.output
end