while(<ASUBFILE>){
   unless (/^[A-Za-z0-9 other expected chars]*$/) {
      print LOG "Encountered unexpected data for $strTName: $_\n";
   }
   $strASub .= $_;
}


##</code><code>##

$;=sub{$/};@;=map{my($a,$b)=($_,$;);$;=sub{$a.$b->()}}
split//,".rekcah lreP rehtona tsuJ";$\=$ ;->();print$/