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: 3256 sottrazione 5464 sottrazione 5786
Example Output: -7994

Example Input: 6549 aggiunta 8683 aggiunta 5430
Example Output: 20662

Example Input: 5233 aggiunta 469 aggiunta 6478 aggiunta 8551 sottrazione 4460
Example Output:
16271