In a certain code, PLEADING is written as FMHCQMFB. How is SHOULDER written in that code?

The last four letters of the word are written in the reverse order, followed by the first four letters in the same order. In the group of letters so obtained, each of the first four letters is moved one step backward while each of the last four letters is moved one step forward to get the code.
Thus, we have :
SHOULDER => SHOU/LDER => REDL/SHOU => QDCK/TIPV