If in a certain language 'MAT' is coded as KYR, how is 'HIS' written in the same language?

1. Each letter shifts back by 2: M→K, A→Y, T→R. 2. Apply −2 to HIS: H→F, I→G, S→Q. 3. So HIS becomes FGQ. _Source: RRB Group D CEN-02/2018 PYQ, Q.95._