I would like to have a.ss template for page 'a' and b.ss and c.ss for pages 'b' and 'c' that will use a.ss.
So my page can be type 'a', 'b' or 'c', but 'b' and 'c' will just use 'a'.
In the other words I am trying to create shared content on 'b' and 'c' pages and have page 'a' be child of multiple parents 'b' and 'c'.
Is this best way to do it and what is the most efficient way to implement this anyway?
My only requirement is that page type 'a' has to be independent so it does not belong to neither of those pages.