Ina code language, ARDOUS is written as 1184152119. How will SYSTEM be written as in that language?

Given that,
The letter and it's squence is given as per the english aphabet sequence,

A $$\ \rightarrow \ 1$$

R $$\ \rightarrow \ 18$$

D $$\ \rightarrow \ 4$$

O $$\ \rightarrow \ 15$$

U $$\ \rightarrow \ 21$$

S $$\ \rightarrow \ 19$$

Similearly,

S $$\ \rightarrow \ 19$$

Y $$\ \rightarrow \ 25$$

S $$\ \rightarrow \ 19$$

T $$\ \rightarrow \ 20$$

E $$\ \rightarrow \ 5$$

M $$\ \rightarrow \ 13$$

Hence, the number will be 19251920513