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: 8279 sottrazione 9535 aggiunta 3852 aggiunta 1579 sottrazione 2724 aggiunta 7562 aggiunta 4315 sottrazione 5859 aggiunta 7197
A:
14666