Sorting Lists Using BSTs

     (sort '(18 12 4 7 17 3 1 9 24 13 5))

     (1 3 4 5 7 9 12 13 17 18 24)

• use list->bstree on the list, then

• get the inorder list of nodes from the BST.

This is Exercise 8.14, p. 225.