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: 7838 sottrazione 8409 sottrazione 8953 sottrazione 4283 aggiunta 3155 aggiunta 7376 sottrazione 5372
Output:
-8648