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: 1504 aggiunta 1038 sottrazione 2395 aggiunta 4759 sottrazione 2914 sottrazione 7633 aggiunta 1701 sottrazione 6369 sottrazione 7531
A:
-17840