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'.
Example: 10 sottrazione 7
Example solution: 3
Example explanation: Here, 'sottrazione' represents the subtraction operation. So, the answer is 3 (10-7=3).

Problem: 1060 aggiunta 8535 sottrazione 1739 aggiunta 1548 aggiunta 7909 sottrazione 3568 sottrazione 3746 sottrazione 6120

Solution: 3879