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: 1517 sottrazione 772 aggiunta 7750 aggiunta 7698 sottrazione 5104 sottrazione 3141 sottrazione 7179 aggiunta 4885 aggiunta 916
A:
6570