The genie nods in satisfaction. "Right. Let's see, let's see..." He pulls a massive tome 
out of nowhere; opens it; pokes studiously at it; turns a page; snorts. Then he arises 
from the couch to his full height, raises the book, and booms...

"How To Program In Lisp!"

Then he plops back into the couch, and adds, "...a self-paced course." He hands you 
the book.

"Your first problem is just to acquaint you with the system. Start up the machine, and 
define twentyseven to have the value 27. You can ask me to 'check' when you're 
ready, or 'repeat' the problem if you need me to."