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: 9301 aggiunta 6607 aggiunta 4322

Output: 20230


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

Output: 2127


Input: Consider Input: 4059 sottrazione 4475 sottrazione 3325 sottrazione 1912 sottrazione 9941 aggiunta 179


Output: -15415