Well, It would help if you distinguished between the Greek Letters and the standard ones.
Are you familiar with the full Greek alphabet?
Did it read:
Phi Epsilon Delta - Eta Mu Alpha, or
Phi Sigma Delta - H.M.A., or some other grouping and spacing? Are we talking all capitals like a Fraternity? Or a mathmatical formula? More information is needed.
To my knowledge there is no Frat named Phi Epsilon Delta. You’l have to give me more to work with.
No, the letter ‘O’ with a horizontal bar in the center is “theta”. It might be the word ‘thelima’? Biblical type folks, any ideas? Will check my Gr>Eng dictionary when I get home tonight.