Alphabetical index plugin

I use a relatively simple and rather outdated plugin to make a page with an alphabetical list of post titles. When I looked for such a plugin, this was the only one that does most of what I want and when I look for alternatives, this little one remains the best. Now I have a wish for it that I can’t create myself. I want to exclude categories from the list. The comment list of the plugin gives the following two options in which the bold lines are added to the plugin file:

$sql = “SELECT p.post_title, p.ID
FROM $wpdb->posts p,
$wpdb->term_relationships t
WHERE p.post_status = ‘publish’
AND p.post_password = ”
AND p.ID = t.object_id
AND t.term_taxonomy_id != ‘5’
AND t.term_taxonomy_id != ‘6’ “;
$Results = $wpdb->get_results($sql);

$sql = “SELECT p.post_title, p.ID
FROM $wpdb->posts p,
$wpdb->post2cat p2c
WHERE p.post_status = ‘publish’
AND p.post_password = ”
AND p.ID = p2c.post_id
AND p2c.category_id != ‘5’
AND p2c.category_id != ‘6’ “;
$Results = $wpdb->get_results($sql);

Both additions give me parse errors, so my question is, what can I add to exclude categories?

[edit] For a second I thought it was easy and I just needed to put an ) before the ; in the last AND line, but that’s not it.