diff -r ed1b6b8c36e5 -r 0b727d1a8184 main_testing3/re_test5.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_testing3/re_test5.scala	Mon Nov 02 02:31:44 2020 +0000
@@ -0,0 +1,8 @@
+import CW8c._ 
+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)