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: 6607 sottrazione 3178 sottrazione 2790 sottrazione 474 sottrazione 2359 aggiunta 6864 aggiunta 1453 aggiunta 1662 sottrazione 8214
A:
-429