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: 3256 sottrazione 5464 sottrazione 5786
Example Output: -7994

Example Input: 731 aggiunta 7513 sottrazione 5550 aggiunta 4078
Example Output: 6772

Example Input: 1314 sottrazione 6012 aggiunta 6525 aggiunta 3616 aggiunta 3203 aggiunta 2409
Example Output:
11055