Hi ALL First time poster with a quick question

I am taking the PMP exam in August and currently trying to memorise ITTO's

My question is I am working off the 5th edition of PMBOK which has additions to ITTO's in comparison to the 4th edition.

I was using the memorizing ITTO's when I started to compare

Do you think I would get away with the 4th edition or should I stick to the 5th edition of PMBok

Any advice is appreciaed.

Thanks