diff -r a0c469a58ed4 -r 3cd6c850c252 marking4/re_test5.scala
--- a/marking4/re_test5.scala	Wed Oct 30 12:47:10 2019 +0000
+++ b/marking4/re_test5.scala	Wed Oct 30 14:07:58 2019 +0000
@@ -1,4 +1,4 @@
-
+import CW9c._ 
 val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
 
 assert(size(der('a', der('a', EVIL_urban))) == 28)