Order switching ala angry driver??

[Teddeeh]

Hello chaps and chapesses

Is it possible to wire a rotary switch with the following
A>b
B>a
A+b (parallel)

Its overdrives im looking to run in parallel.
Cheesus (our dairy flavoured lord) salutes you.

[jaredcohen]

Ok, I have zero use for this. But now I want the answer, because I just spent an hour staring at a rotary switch. It's possible, but I can't figure out how.