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'.

Ex Input:
241 sottrazione 7890 sottrazione 7518 aggiunta 9059

Ex Output:
-6108


Ex Input:
720 sottrazione 3331 sottrazione 6932

Ex Output:
-9543


Ex Input:
5544 aggiunta 2016 sottrazione 9099

Ex Output:

-1539