Definition: 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'.
Input: 8101 sottrazione 9699 sottrazione 9143 sottrazione 9021 sottrazione 6497 aggiunta 5564 aggiunta 3306
Output:
-17389