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: 6444 aggiunta 3825 sottrazione 7862 sottrazione 7478 aggiunta 7698 aggiunta 2753 sottrazione 5998 sottrazione 3744 aggiunta 1504
Output:
-2858