My XML parser code

my $twig = XML::Twig->new(
    twig_handlers => {
                                    'Mughals' => sub {
                                                                      
+          my ($twig, $el) = @_;
                                                                      
+          $twig->purge;
                                                                      
+        },

                                    'Mughals//*' => sub {
                                                                      
+              my $a = $_->tag;
                                                                      
+              if ($a eq "Book")
                                                                      
+              {
                                                                      
+                  print $fout1 "\n";
                                                                      
+                  print $fout2 "\n";
                                                                      
+               }
              #print  $fout1 $_->tag, ", ", $_->text, unless ($_->has_
+children('#ELT'));
              print  $fout2 $_->tag, ",", unless ($_->has_children('#E
+LT'));
              print  $fout1 $_->text, ",", unless ($_->has_children('#
+ELT'));
              
                                            }

    }

);
$twig->parsefile('book.xml');
[download]

This is a part of the code for parsing one part of the file 'Mughals'. The path to Mughals is History->Indian History -> Mughals. I am confused about how to accept this input from the user.