In a certain code language, 'APPROACH' is written as '116161815138' and ‘APPROVAL’ is written as ‘11616181522112’. How will 'POOL' be written in that language?

16151512

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 :

LETTERS ARE CODED BASED ON THEIR PLACE VALUE :

AS

A   P   P   R    O   A  C  H

1  16 16  18  15   1   3   8

AND

A    P  P  R   O   V   A  L

1   16 16 18  15 22  1  12

SIMILARLY

P      O    O      L

16    15   15    12