In a certain code language, ‘APRON’ is written as ‘CNTMP’ and ‘EARTH’…

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 :

ALHABETS PLACES AT EVEN PLACES  ARE DECREASED TO 2 POSITIONAL VALUE

ALHABETS PLACES AT ODD  PLACES  ARE INCREASED TO 2 POSITIONAL VALUE

A → (+2) → C

P → (-2) → N

R → (+2) → T

O → (-2) → M

N → (+2) → P

AND

E → (+2) → G

A → (-2) → Y

R → (+2) → T

T → (-2) → R

H → (+2) → J

SIMILARLY

H → (+2) → J

E → (-2) → C

A → (+2) → C

V → (-2) → T

Y → (+2) → A