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: 1218 aggiunta 4661 sottrazione 3709 aggiunta 4675 sottrazione 1496 aggiunta 1070 aggiunta 8556 sottrazione 3605
A:
11370