I know that somebody can figure it out, the exact letters because it is in English letters - you will find more of them much harder to decipher that Fermat's Last Theorem, conceived in 1637 and was solved only in 1995.
I got several of MOP which are more complicated because they are in Oriental writings, I did not bother to find out what they are and what they mean - I simply stashed them away.
Good luck.
Leonidas