boardcomputer01.rb

#! /usr/bin/ruby
def parse(string)
  string.each_line do |line|
    list = line.split(" ")
    print "#{list.first}: "
    list[1..-1].each do |token|
      raise "input's size  should 2(#{token})" if token.size != 2
      token.split("").each do |char|
        num = char.chomp.hex.to_s(2)
        print "#{'0'*(4-num.size%4) if num.size%4 != 0}#{num}"
      end
      print " "
    end
    puts
  end
end
  
parse(ARGF.read)