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: 4591 sottrazione 9679 sottrazione 6816 aggiunta 6555 aggiunta 5102 sottrazione 8989
A: 
-9236