The Library of Babel is a library which contains an infinite number of hexagonal rooms, each with four exits and four walls containing bookshelves full of 410 page books, each page with 40 lines of 80 characters. These books contain random permutations of the 25 basic characters.
Suppose the number of books in all rooms of the library is the same and is N. One starts in a random room in the library, and selects X books at random from a uniform distribution on N, i.e. X