my $p = HTML::TokeParser::Simple->new(\$html);
my (%href, $this_href, $number, $letter);

while (my $t = $p->get_token){
  
  if ($t->is_start_tag('h2')){
    $letter = $p->get_trimmed_text('/h2');
    next;
  }
  
  if ($t->is_start_tag('a')){
    # skip bookmarks
    next if $t->get_attr('name');
    $this_href =  $t->get_attr('href');
    next;
  }
  
  if ($t->is_start_tag('span')){
    $number = $p->get_trimmed_text('/span');
    $href{$letter}{$this_href} = $number;
    next;
  }
  
}

##</code><code>##

---------- Capture Output ----------
> "C:\Perl\bin\perl.exe" _new.pl
A
	pdf\8a956f66-1c60-48fc-905c-b49d617aa6c5.pdf -> 110377660
	pdf\c76b834e-36e1-497b-b13e-eba2348dc044.pdf -> 110136892
	pdf\ae8d51e0-005b-44be-84cb-3c9b57335755.pdf -> 108318866
	pdf\37d3e78b-1adb-458b-9e89-0df780909f08.pdf -> 108116112
	pdf\e646f948-f78d-4463-a01d-0261aebf70dc.pdf -> 113069066
	pdf\6c0a5bb4-143d-4305-957b-796c8193d07a.pdf -> 116815754
B
	pdf\8a956f66-1c60-48fc-905c-b49d617aa6c5.pdf -> 110377660
	pdf\c76b834e-36e1-497b-b13e-eba2348dc044.pdf -> 110136892
	pdf\ae8d51e0-005b-44be-84cb-3c9b57335755.pdf -> 108318866
	pdf\37d3e78b-1adb-458b-9e89-0df780909f08.pdf -> 108116112
	pdf\e646f948-f78d-4463-a01d-0261aebf70dc.pdf -> 113069066
	pdf\6c0a5bb4-143d-4305-957b-796c8193d07a.pdf -> 116815754
C
	pdf\8a956f66-1c60-48fc-905c-b49d617aa6c5.pdf -> 110377660
	pdf\c76b834e-36e1-497b-b13e-eba2348dc044.pdf -> 110136892
	pdf\ae8d51e0-005b-44be-84cb-3c9b57335755.pdf -> 108318866
	pdf\37d3e78b-1adb-458b-9e89-0df780909f08.pdf -> 108116112
	pdf\e646f948-f78d-4463-a01d-0261aebf70dc.pdf -> 113069066
	pdf\6c0a5bb4-143d-4305-957b-796c8193d07a.pdf -> 116815754

> Terminated with exit code 0..