JQDKB : The order of the letters of the first group is reversed and each letter is moved one step backward to obtain the correspondin letters of the second group
The first and third letters of the first group are each moved two steps forward, and the second and fourth letters are each moved two steps backward to obtain the corresponding letters of the second group.
In all others, digit at 1st position moves to 3rd position, digit at 2nd position moves to 1st position and digit at 3rd position moves to 2nd position