Hi everyone, sorry, yes I wrote my post in a hurry and did get my letters wrong! I should have put -O-L-E-
So Boulder fits, and parses beautifully! Thank you very much and apologies for the confusion.
Julesverne, thanks for the update - though I wasn't involved. I just wanted to say that as I get older and more decrepit, I find ???? for unknown letters much easier to read than ---.