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 input: 10 sottrazione 7
Example output: 3
Example explanation: Here, 'sottrazione' represents the subtraction operation. So, the answer is 3 (10-7=3).
Q: 352 aggiunta 482 aggiunta 971 sottrazione 6029 aggiunta 7233 sottrazione 7435 sottrazione 8653 sottrazione 3989 sottrazione 437
A:
-17505