Deciphering camshaft bearing cap numbers

I have the car listed above non turbo. I replaced the leaking head gasket. I had set aside the camshaft bearing caps in order then went to bed. Upon returning to finish up I noticed they were not where I left them. My mom saw them sitting out and scooped them up and put them in the vehicle in a plastic bag. She thought that it would be a good idea to put them up in case it rained.So now they're all out of order. Usually the camshaft bearing caps would be marked R1, R2, R3, L1, L2 Exedra exedra. Mine are marked 3.12 / 209 AB, 3.12 / 209 AB, 3.15 / 209 AB,3.18 / 209 AB,3.19 / 209 AB,3.20 / 209 AB,3.2 / 209 AB, 3.2 / 209 AB,3.4/209 AB. What do these numbers and letters mean? And do these numbers and letters correspond with R1 R2 L1 L2 Etc. If not how can I find where they go. Or can I buy a new set of camshaft bearing caps and just torque them down. Also, we bought the car new and it has not had the camshaft or any of this replaced or worked on previously.