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: 3658 aggiunta 635 aggiunta 2969 aggiunta 1911 aggiunta 2417 aggiunta 6959
A: 
18549