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: 8465 sottrazione 9449 aggiunta 9623 aggiunta 833 sottrazione 3551
A: 
5921