#!/usr/bin/ruby

require 'enumerator'

class Fixnum
	def pchr
		if (self & 0x60).zero? or self == 0x7f
			'.'
		else
			chr
		end
	end
end

puts (0..255).map { |c| "#{'%.2x' % c} #{c.to_s.ljust 3} #{c.pchr}" }.enum_slice(32).to_a.transpose.map { |l| l.join "    " }