[Ruby] base64 decoder

[Jako]

#!/usr/bin/env ruby
require "base64"
File.open('lista.txt', 'r') do |f1|                
 while line = f1.gets  
       val= line.split(":")
       b64decode=Base64.decode64(val[1])
       printf "%s%s%s\n",val[0],":",b64decode
 end  
end

in loc de lista.txt introdu numele listei tale.