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: 4505 sottrazione 6937 aggiunta 8058 aggiunta 9798 sottrazione 6523 aggiunta 5360 aggiunta 538 sottrazione 1917 aggiunta 1286

Solution: 14168