In a certain code language, 'FOUR' is written as '6PV18'. How will 'DARK' be written in that language?

4B1S1 4SB11 4BS11 4BS12

4BS11

In the code, the first and fourth letters is replaced by its place value, and the second and third letters are replaced by their next letter in the alphabet series, such that: In this code, 'DARK' is written as :