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: 846 aggiunta 4144 aggiunta 2870 aggiunta 1773 aggiunta 4204 aggiunta 4435
Example Output: 18272

Example Input: 8530 sottrazione 4910 sottrazione 2625 sottrazione 6130
Example Output: -5135

Example Input: 3921 sottrazione 7797 sottrazione 7069
Example Output:
-10945