spanish and then the system he's using and it will be random letters and an is 1 or b is 2 or an old presidential or free mason cold and then figure out reconstruction the key and fourth step to decode the message. >> wow. so the fbi posted the notes on the website. have you got an chance to look at them? >> not only did i look at them but i immediately sent them to our staff. i was like to do an episode on this. what's interesting to me is the fbi is not a dumb group here. they're among the best decoders out there and their cryptography division is incredible. when they're asking for help, there's a real problem. when you look at the codes, sometimes you can see things that repeat and in the lack wage the letter "e" is most used letter and you can decode most normal lett aal words for that .