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: 9523 aggiunta 3442 sottrazione 4431 sottrazione 4216 aggiunta 1628

Output: 5946


Input: Consider Input: 350 aggiunta 3392 sottrazione 542

Output: 3200


Input: Consider Input: 7592 sottrazione 2396 aggiunta 2060


Output: 7256