1 <a> <bc>                |  9:      EXACTF <b>(14)
   2 <ab> <c>                | 14:      WHILEM[1/1](0)
                                        whilem: matched 1 out of 1..32767
   2 <ab> <c>                |  3:        BRANCH(11)
   2 <ab> <c>                |  4:          OPEN1(6)
   2 <ab> <c>                |  6:          REG_ANY(7)
   3 <abc> <>                |  7:          CLOSE1(9)