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: 4074 aggiunta 7323 sottrazione 8397 sottrazione 9295 sottrazione 7495 aggiunta 8747
Output:
-5043