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: 3024 aggiunta 8624 sottrazione 3959 sottrazione 7765 aggiunta 655 sottrazione 6106 aggiunta 7927 aggiunta 8913 aggiunta 7772
A:
19085