--- a/testing4/re_test5.scala	Thu Oct 31 11:33:02 2019 +0000
+++ b/testing4/re_test5.scala	Thu Oct 31 12:01:56 2019 +0000
@@ -1,7 +1,8 @@
-
+import CW9c._ 
 val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
 
 assert(size(der('a', der('a', EVIL_urban))) == 28)
 assert(size(der('a', der('a', der('a', EVIL_urban)))) == 58)
 
 assert(size(ders("aaaaaa".toList, EVIL_urban)) == 8)
+assert(size(ders(("a" * 50).toList, EVIL_urban)) == 8)