. >> let me first say, mr. liddyu serve our country in many, many ways -- business, fbi, cia, government -- and i defer to you in the magnitude of the solidity of your service. >> well, sir, as i try to explain to people, any damn fool can keep his mouth shut, and nobody was, you know, whamming on me the way they were on you. [laughter] thank you, though, for those very kind words. now, tell me about this very elaborate communications system that you have. you're all isolated in separate cells, and yet you had a communication system where you could identify who was where? you had code names for different parts of the prison in which you were held. you, you had a command and control set up that was based on rank and data rank. who created that system? when you got there, was it in existence, or did you create it? how did it work? >> when we went to survival, evasion, resistance and escape, we learned there was a tap code by which you blocked off the alphabet five by five and just indicated a row and column for each of