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: 3855 sottrazione 8356 sottrazione 7196 sottrazione 4148 aggiunta 5364 aggiunta 3806 aggiunta 7683 aggiunta 8558 sottrazione 866
A:
8700