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: 9301 aggiunta 6607 aggiunta 4322
Example Output: 20230

Example Input: 6639 sottrazione 5121 aggiunta 205 aggiunta 2175 aggiunta 4534 sottrazione 1535
Example Output: 6897

Example Input: 2444 sottrazione 7084 sottrazione 6633
Example Output:
-11273