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'.

Input: Consider Input: 4661 sottrazione 7448 aggiunta 8140 sottrazione 3226

Output: 2127


Input: Consider Input: 2347 sottrazione 224 aggiunta 5509 aggiunta 3753 aggiunta 7232

Output: 18617


Input: Consider Input: 6640 sottrazione 900 aggiunta 3215 aggiunta 9364 sottrazione 3429 aggiunta 860

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Output: 15750


