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: 8208 sottrazione 3852 aggiunta 6458 aggiunta 1036 aggiunta 5309
A: 
17159