-;(load "scheme-library-3-functional.scm")
-;(load "scheme-library-4-numbers.scm")
-;(load "scheme-library-5-lists.scm")
-;(load "scheme-library-6-testing.scm")
+(load "scheme-library-3-functional.scm")
+(load "scheme-library-4-numbers.scm")
+(load "scheme-library-5-lists.scm")
+(load "scheme-library-6-testing.scm")