In a certain code language, 'SWISS' is written as 'HDRHH', and 'TABOO' is written as 'GZYLL'. How will 'REHAB' be written in that language?

IVSZY

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

**********************************************************

THE LOGIC FOLLOWED HERE IS:

S → (OPPOSITE) → H

W → (OPPOSITE) → D

I → (OPPOSITE) → R

S → (OPPOSITE) → H

S → (OPPOSITE) → H

AND,

T → (OPPOSITE) → G

A → (OPPOSITE) → Z

B → (OPPOSITE) → Y

O → (OPPOSITE) → L

O → (OPPOSITE) → L

SIMILARLY

R → (OPPOSITE) → I

E → (OPPOSITE) → V

H → (OPPOSITE) → S

A → (OPPOSITE) → Z

B → (OPPOSITE) → Y