In a certain code language, ‘GRMTS’ is coded as ‘OPINC’. What is the code for ‘BATCH’ in that code language ?

DYPWX

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

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THE LOGIC FOLLOWED HERE IS :

REVERSE THE WORD AND DECREASE EACH LETTER BY -4

GRMTS = STMRG

S → (-4) → O

T → (-4) → P

R → (-4) → I

M → (-4) → N

G → (-4) → C

SIMILARLY

BATCH = HCTAB

H → (-4) → D

C → (-4) → Y

T → (-4) → P

A → (-4) → W

B → (-4) → X