From the given information:-
The positions of R, E and N in the two words are the same as the positions of F, G and J in the codes of both the words.
So, the codes for 'R', 'E' and 'N' are 'F', 'G' and 'J', respectively.
Hence, the codes of the letters are:-
So, the code for REPRINT is:-
Hence, the correct answer is "FGBFXJK" .