| script         | lisp interpreter fixture                |
| input          | (defun adderx (x) (lambda (y) (+ x y))) |
| discard output |
| input          | (setf adder20 (adderx 20))              |
| discard output |
| input          | (funcall adder20 2)                     |
| check          | output                             |!-22

-!|