Timing belt question

How many teeth does a B18A/B timing belt have? I think I may have the wrong one like off a B18C and it may be a tooth or two off. It seems to be a bit tighter to get on with the tensioner locked in the install position than it should be.

I’m dumb and threw the old one away then waited a week to install the new one and I can’t quite seem to get it right. I’ve done enough belts so this shouldn’t be an issue. I’m starting to second guess myself, argh! Thanks in advance.:fucksuvs:

Why count teeth? Make it easy on yourself and check the P/N on the belt and verify that it is the correct application.