In a certain code, BROUGHT is written as SGFVAQN. How is SUPREME written in that code?

The last four letters of the word are written in the reverse order, followed by the first three letters in the same order. In the group of letters so obtained, each letter except the middle letter is moved one step backward while the middle letter is moved one step forward to get the code.
Thus, we have :
SUPREME => SUP/REME => EMER/SUP => DLD/SRTO.