Gained exemptions from university, but its been a while. Need advice

Hi,

I did Accounting at University and as a result I have got exemptions to all the F papers. Therefore I only need to sit the P papers. However I graduated a few years ago and therefore I have forgotten most of the things I learnt about.

I just want to know:

Do I need to revise F1 to F9 before i sit the remaining P Papers?

or do you think it is possible to pass certain P Papers without revising the content for F1 to F9? (If yes, please mention which papers).

Thanks in advance!