sicp exercise 2.24

;  Exercise 2.24. Suppose we evaluate the expression (list 1 (list 2 (list 3 4))). Give the
;  result printed by the interpreter, the corresponding box-and-pointer structure, and the
;  interpretation of this as a tree (as in figure 2.6).


(define x (list 1 (list 2 (list 3 4))))

(display x) (newline)