First compute make-list e empty
.
Then compute (make-list e empty) make-list empty
.
Then compute make-list f (make-list e empty)
.
Then compute (make-list f (make-list e empty)) make-list empty
.
Now guess the complete answer.
First compute make-list e empty
.
Then compute (make-list e empty) make-list empty
.
Then compute make-list f (make-list e empty)
.
Then compute (make-list f (make-list e empty)) make-list empty
.
Now guess the complete answer.