Here's a solution for one interpretation of your question:

#!/usr/bin/perl
use strict;
use warnings;
(my $string = shift()) =~ s/(\d+)/reverse $1/ge;
print "$string\n";

[download]

Save as foo.pl and then call it as

foo.pl abc123def4567g890

to get output like

abc321def7654g098

In reply to Re: Reverse fraction of a string by perlpie
in thread Reverse fraction of a string by Bintuch

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