Negating positional qualifiers:

• not-first-of-type(): not first sibling of its type
• not-last-of-type(): not last sibling of its type
• not-first-of-any(): not first sibling of any type
• not-last-of-any(): not last sibling of any type
• not-only-of-type(): not only sibling of its type
• not-only-of-any(): not only sibling of any type