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: 672 sottrazione 4404 aggiunta 5593 aggiunta 7193 aggiunta 7968

Output: 17022


Input: Consider Input: 9301 aggiunta 6607 aggiunta 4322

Output: 20230


Input: Consider Input: 5504 sottrazione 8576 sottrazione 1826 aggiunta 1869 sottrazione 178


Output: -3207