In a certain code language, ‘MOUNTAIN’ is written as ‘MNIATNUO’ and ‘SENTENCE’ is written as ‘SECNETNE’. How will ‘BIRTHDAY’ be written in that language?

BYADHTRI

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 :

FIRST ALPHABET IS AT SAME PLACE

SECOND ALPHABET IS PLACED AT EIGHTH PLACE

THIRD ALPHABET IS PLACED AT SEVENTH PLACE

FOURTH ALPHABET IS PLACED AT SIXTH  PLACE

SIXTH ALPHABET IS PLACED AT FOURTH PLACE

SEVENTH ALPHABET IS PLACED AT THIRD PLACE

EIGHT ALPHABET IS PLACED AT SECOND PLACE

AS

MOUNTAIN = MNIATNUO

SIMILARLY

BIRTHDAY = BYADHTRI