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: 235 aggiunta 6670 sottrazione 1469 aggiunta 5121 sottrazione 7873

Output: 2684


Input: Consider Input: 769 aggiunta 7758 aggiunta 7584

Output: 16111


Input: Consider Input: 3282 aggiunta 9526 sottrazione 125 aggiunta 2025


Output: 14708