In a certain code language, ‘RIVER’ is written as ‘10-3-5-2-10’ then how will ‘PETROL’ be written in the same code language?

12-2-8-10-4-16

Given; In a certain code language, ‘RIVER’ is written as ‘10-3-5-2-10’ 

So,

R = 10

I = 3

V = 5

E = 2

And coding the vowels a,e,i,o,u as follow;

A = 1

E = 2

I = 3

O = 4

U = 5

Thus, the  ‘PETROL’ be written as

P =

E = 2

T = 

R = 10

O = 4

L = 

And, the similar code is 12-2-8-10-4-16