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: 9483 sottrazione 8559 sottrazione 233
Example Output: 691

Example Input: 6043 aggiunta 2492 aggiunta 3435
Example Output: 11970

Example Input: 2815 aggiunta 1185 sottrazione 6245 sottrazione 6024
Example Output:
-8269