You will be given a definition of a task first, then some input of the task.
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'.

8395 aggiunta 3448 aggiunta 9834 sottrazione 4339 aggiunta 2908 aggiunta 5640 aggiunta 5179 sottrazione 2761 sottrazione 7580
Output:
20724