In a certain code language, ‘pinch of salt grey’ is written as ‘ab tr # kp’, ‘grey colour is black’ is written as ‘# jm bk if’ and ‘colour are of track’ is written as ‘gt if ab fr’. How will ‘grey of’ be written in that language?

#ab gt # ab if gt fr

#ab

Hence, "grey of" can be written as : #ab