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'.

Example Input: 7729 sottrazione 3948 sottrazione 8976 aggiunta 3549 aggiunta 4386 aggiunta 6064 aggiunta 9479
Example Output: 18283

Example Input: 968 aggiunta 5257 aggiunta 7238
Example Output: 13463

Example Input: 3250 sottrazione 7854 aggiunta 819
Example Output:
-3785