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: 6761 aggiunta 9552 aggiunta 7279
Example Output: 23592

Example Input: 8268 aggiunta 585 aggiunta 3530
Example Output: 12383

Example Input: 7011 sottrazione 905 sottrazione 8356 sottrazione 5120
Example Output:
-7370