| 153 |      1 | 
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| 472 |      2 | def urbanmain() = {
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|  |      3 |   import M3._
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|  |      4 | 
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|  |      5 |   val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
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| 153 |      6 | 
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| 472 |      7 |   assert(ders(("a" * 5).toList, EVIL_urban) == SEQs(List(STAR(CHAR('a')), STAR(STAR(CHAR('a'))), CHAR('b'))))
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|  |      8 |   assert(ders(List('b'), EVIL_urban) == ONE)
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|  |      9 |   assert(ders(List('b','b'), EVIL_urban) == ZERO)
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|  |     10 |   assert(matcher(EVIL_urban, "a" * 5 ++ "b") == true)
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|  |     11 |   assert(matcher(EVIL_urban, "a" * 50 ++ "b") == true)
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|  |     12 |   assert(matcher(EVIL_urban, "a" * 50) == false)
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|  |     13 |   assert(matcher(EVIL_urban, "b") == true)
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|  |     14 |   assert(matcher(EVIL_urban, "bb") == false)
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|  |     15 |   assert(matcher("abc", "abc") == true)
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|  |     16 |   assert(matcher("abc", "ab") == false)
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|  |     17 |   assert(matcher(("ab" | "a") ~ (ONE | "bc"), "abc") == true)
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|  |     18 |   assert(matcher(ONE, "") == true)
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|  |     19 |   assert(matcher(ZERO, "") == false)
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|  |     20 |   assert(matcher(ONE | CHAR('a'), "") == true)
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|  |     21 |   assert(matcher(ONE | CHAR('a'), "a") == true)
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|  |     22 | }
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