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: 8628 sottrazione 9772 sottrazione 363 sottrazione 3768 sottrazione 5854

Output: -11129


Input: Consider Input: 6200 aggiunta 9179 aggiunta 4596 sottrazione 2098

Output: 17877


Input: Consider Input: 4993 sottrazione 5623 aggiunta 9986 aggiunta 1734


Output: 11090