Detailed Instructions: 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: 6223 sottrazione 8157 aggiunta 9146 sottrazione 4191 sottrazione 1509 aggiunta 3990
A:
5502