| 168 |      1 | 
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|  |      2 | 
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|  |      3 | val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
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|  |      4 | 
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|  |      5 | assert(ders(("a" * 5).toList, EVIL_urban) == SEQ(SEQ(STAR(CHAR('a')),STAR(STAR(CHAR('a')))),CHAR('b')))
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|  |      6 | assert(ders(List('b'), EVIL_urban) == ONE)
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|  |      7 | assert(ders(List('b','b'), EVIL_urban) == ZERO)
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|  |      8 | assert(matcher(EVIL_urban, "a" * 5 ++ "b") == true)
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| 245 |      9 | assert(matcher(EVIL_urban, "a" * 50 ++ "b") == true)
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|  |     10 | assert(matcher(EVIL_urban, "a" * 50) == false)
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| 168 |     11 | assert(matcher(EVIL_urban, "b") == true)
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|  |     12 | assert(matcher(EVIL_urban, "bb") == false)
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|  |     13 | assert(matcher("abc", "abc") == true)
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| 245 |     14 | assert(matcher("abc", "ab") == false)
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| 168 |     15 | assert(matcher(("ab" | "a") ~ (ONE | "bc"), "abc") == true)
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|  |     16 | assert(matcher(ONE, "") == true)
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|  |     17 | assert(matcher(ZERO, "") == false)
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|  |     18 | assert(matcher(ONE | CHAR('a'), "") == true)
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|  |     19 | assert(matcher(ONE | CHAR('a'), "a") == true)
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