How do you catalog the Germany Postal Stationery that contains compound Private Printed images?
I came across a stack that have up to 3 compound values on each postal card/envelope/aerogramme.
Michels does not make this clear (perhaps if I spoke German it would help!)

Any German postal stationery collector out there that can answer this?
Here is an example of what I am talking about:

Note: The top item is a 40-25-40 compound, while the bottom item is a 40-40-25 compound. They both use the same items but in different order.
How does one list these? There are singles, doubles, triples in various order. Has someone (catalog) ever itemized these? Michels hasn't.
Any help?