 
 <prompt> Jonathan's full name contains 8 letters for the first name and 10 letters for the surname. His sister's name has 5 letters for the first name and 10 letters for the second name. What's the total number of letters in their names?

```Yoruba translation:
Oruko omo Jonathan ni 8 lẹtà fún oruko akọkọ ati 10 lẹtà fún oruko abiso. Oruko aburo rẹ ni 5 lẹtà fún oruko akọkọ ati 10 lẹtà fún oruko abiso. Kini nọmba pẹlu lẹtà ni oruko wọn?``` <response>: Jonathan ni oruko re ni 8 + 10 = 18 titun.
Iyawo re ni 5 + 10 = 15 titun.
Ile-iwe oruko won ni 18 + 15 = 33

Awọn iwadi yoo wa ni 33. 