In a certain code language, ‘CITY’ is written as ‘241872’, and ‘DRUG’ is written as ‘239620’. How will ‘GOLF’ be written in that language?

The logic of the code relies on the positional values of the opposite pairs of letters in the English alphabet (where $A\leftrightarrow Z$, $B\leftrightarrow Y$, etc., or $\text{Opposite Value}=27-\text{Original Value}$).
* For 'CITY':
* $\text{C}\to \text{Opposite is X}\to 24$
* $\text{I}\to \text{Opposite is R}\to 18$
* $\text{T}\to \text{Opposite is G}\to 7$
* $\text{Y}\to \text{Opposite is B}\to 2$
* Combining these numbers gives: 241872

* For 'DRUG':
* $\text{D}\to \text{Opposite is W}\to 23$
* $\text{R}\to \text{Opposite is I}\to 9$
* $\text{U}\to \text{Opposite is F}\to 6$
* $\text{G}\to \text{Opposite is T}\to 20$
* Combining these numbers gives: 239620

Applying the same logic for 'GOLF':

* $\text{G}\to \text{Opposite is T}\to 20$
* $\text{O}\to \text{Opposite is L}\to 12$
* $\text{L}\to \text{Opposite is O}\to 15$
* $\text{F}\to \text{Opposite is U}\to 21$
* Combining these numbers gives: 20121521