In this task you will be given an arithmetic operation in Italian and you have to find its answer. The operations 'addition' and 'subtraction' have been replaced with their italian translations i.e you need to perform addition when you see 'aggiunta' and subtraction in case of 'sottrazione'.
Q: 8263 aggiunta 9431 sottrazione 3248 sottrazione 8354 aggiunta 7636 aggiunta 6340 aggiunta 3876 sottrazione 6102
A: 
17842