Instructions: 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: 8163 sottrazione 3025 sottrazione 7249 aggiunta 5400 sottrazione 6426 aggiunta 2057 aggiunta 685 sottrazione 237
Output:
-632