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: 1370 sottrazione 7268 sottrazione 7735

Output: -13633


Input: Consider Input: 6453 aggiunta 8732 sottrazione 2877

Output: 12308


Input: Consider Input: 2919 aggiunta 2493 sottrazione 4867 sottrazione 7270 sottrazione 146 sottrazione 7854


Output: -14725