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: 5940 sottrazione 4378 aggiunta 680 sottrazione 5351 aggiunta 1968
Example Output: -1141

Example Input: 7917 aggiunta 2150 aggiunta 1024 aggiunta 8412
Example Output: 19503

Example Input: 6212 sottrazione 9629 sottrazione 5222
Example Output:
-8639