In a certain code language, ‘ULTERIOR’ is written as ‘33259969’. How will ‘NAVIGATION’ be written as in that language?

Given that ‘ULTERIOR’ is written as ‘33259969’ 

We know that alphabet position A=1, B=2, C=3, D=4 ........... Z=26

‘ULTERIOR’ is written as alphabet position 

  21 12 20 5 18 9  15 18

the pattern is going on add alphabet position in single-digit

(2+1) (1+2) (2+0) (5) (1+8) (9) (1+5) (1+8)

3 3 2 9 9 8 6 9

Similarly, 

  ‘NAVIGATION’ is written as alphabet position

   14 1 22 9 7 1 20 9 15 14

the pattern is going on add alphabet position in single-digit

(1+4) (1) (2+2) (9) (7) (1) (2+0) (9) (1+5) (1+4)

 5 1 4 9 7 1 2 9 6 5 Ans