#lang racket

;; list functions you want to be visible to the test module here
(provide app)

;; CSE 413 19wi hw3demo.rkt
;; example function to be verified by tests in hw3demo-tests.rkt

(define (app lst1 lst2)
    (if (null? lst1)
        lst2
        (cons (car lst1) (app (cdr lst1) lst2))))