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|      1 import M3._  |      1 import M3._ | 
|      2 val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b')) |         | 
|      3  |      2  | 
|      4 assert(size(der('a', der('a', EVIL_urban))) == 28) |      3 assert(flts(List(CHAR('a'), ZERO, ONE), Nil) == List(ZERO)) | 
|      5 assert(size(der('a', der('a', der('a', EVIL_urban)))) == 58) |      4 assert(flts(List(CHAR('a'), ONE, ONE, CHAR('b')), Nil) == List(CHAR('a'), CHAR('b'))) | 
|         |      5 assert(flts(List(ONE ~ CHAR('a'), CHAR('b') ~ ONE), Nil) == List(ONE, CHAR('a'), CHAR('b'), ONE)) | 
|      6  |      6  | 
|      7 assert(size(ders("aaaaaa".toList, EVIL_urban)) == 8) |         | 
|      8 assert(size(ders(("a" * 50).toList, EVIL_urban)) == 8) |         |