Split file into several and reformat

[bomber71 at aapt.net.au]

Hi,

I want to take read an input file (sels.txt) that looks like:

Begin sels
   sel1 = {1001, 1002, 1003, ...
           ...
           1099}

   sel2 = {1001, 1008, 1009 ...
           ...
           1299}
End sels

And turn it into an output file for each of the "sels" in the input file, i.e
sel1.txt:

L1001
L1002
L1003
...
L1099

and sel2.txt:

L1001
L1008
L1009
...
L1299

And so on. Many thanks,
Wayne