1 import CW8c._

     2  

     3 val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))

     4 

     5 assert(size(der('a', der('a', EVIL_urban))) == 28)

     6 assert(size(der('a', der('a', der('a', EVIL_urban)))) == 58)

     7 

     8 assert(size(ders("aaaaaa".toList, EVIL_urban)) == 8)

     9 assert(size(ders(("a" * 50).toList, EVIL_urban)) == 8)