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  1. or download this
        my $count = @{ $doc->{$sub1} };
        print "\n$sub1\t";
    
        for (my $i=0; $i <= $count; $i++) {
    
  2. or download this
        my $count = $#{ $doc->{$sub1} };
        print "\n$sub1\t";
    
        for my $i ( 0 .. $count ) {