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: 1707 aggiunta 8742 aggiunta 5656 sottrazione 1534 aggiunta 7833 aggiunta 4756 aggiunta 3493 aggiunta 7673

Solution: 38326