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      1 =>a
      2 1 a
      3 1 a | a
      4 0 b
      5 =>a|b
      6 1 a
      7 1 b
      8 1 a | b
      9 0 a{0}
     10 0 b{0}
     11 =>a | b | a
     12 1 a
     13 1 b
     14 1 a | b
     15 1 b | a
     16 1 a | b | b
     17 1 a | b | a
     18 1 b | a | b
     19 =>a,a
     20 1 a,a
     21 0 a
     22 0 a,a,a
     23 =>a{0,3}
     24 1 a{3}
     25 1 a
     26 1 a,a,a
     27 1 a{1,3}
     28 =>(a|b){0,4}
     29 1 a
     30 1 b
     31 1 a,b
     32 1 a,b,a,b
     33 0 b,a,b,a,b
     34 1 b,a{1,3}
     35 1 a{1,3},b
     36 0 a{1,3},b,a
     37 0 a{1,4},b
     38 0 a{0,5}
     39 1 (b|a){0,4}
     40 0 (b|a){0,4},a
     41 1 (a,b){0,2}
     42 1 (a,b){0,1},b
     43 => a*
     44 1 a
     45 1 a?
     46 1 a+
     47 1 a*
     48 1 a{0}
     49 => a+
     50 1 a
     51 0 a?
     52 1 a+
     53 0 a*
     54 1 a?,a
     55 1 a,a*
     56 1 a*,a
     57 1 a?,a*,a
     58 1 a*,a?,a
     59 =>(a|b)*
     60 1 a
     61 1 b
     62 1 a,b
     63 1 a,b,a,b
     64 1 (b|a){0,4}
     65 1 (b|a){0,4},a
     66 1 a*
     67 1 b*
     68 1 (a|b)*
     69 1 a{1,3}
     70 1 b,a{1,3}
     71 1 a{1,3},b
     72 1 a*,(a|b)*
     73 1 a*,b{2,5}
     74 1 a*,(a|b)*,b{2,5}
     75 =>(a|b)+,(c|d)
     76 1 a+,c
     77 0 a*,c
     78 1 a,c
     79 1 a,b*,a*,c
     80 # more complex
     81 =>(a|b),(a|c){0,100}
     82 1 a{0,100},(a|c)
     83 0 a{0,101},(a|c)
     84 # the example from cmsmcq at extreme markup 05
     85 =>(a, ((b, c, d){0,5}, e{0,1}){0,4}, f)
     86 1 (a, b, (c, d, b){2,3}, c, d, e, f)
     87