Matching REx "(.*?)(\d*)" against "I have 2 numbers: 53147"
   0 <> <I have 2 n>         |   0| 1:OPEN1(3)
   0 <> <I have 2 n>         |   0| 3:MINMOD(4)
   0 <> <I have 2 n>         |   0| 4:STAR(6)
   0 <> <I have 2 n>         |   1|  6:CLOSE1(8)
   0 <> <I have 2 n>         |   1|  8:OPEN2(10)
   0 <> <I have 2 n>         |   1|  10:STAR(12)
                             |   1|  POSIXU[\d] can match 0 times out of 2147483647...
   0 <> <I have 2 n>         |   2|   12:CLOSE2(14)
   0 <> <I have 2 n>         |   2|   14:END(0)
Match successful!
(.*?)(\d*)   <> <>