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: 6299 aggiunta 376 sottrazione 2069
Example Output: 4606

Example Input: 3055 sottrazione 6506 aggiunta 7787
Example Output: 4336

Example Input: 3908 aggiunta 1276 sottrazione 8511 aggiunta 4404 sottrazione 1999
Example Output:
-922