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: 8530 sottrazione 4910 sottrazione 2625 sottrazione 6130
Example Output: -5135

Example Input: 5912 aggiunta 8754 aggiunta 4209
Example Output: 18875

Example Input: 1179 sottrazione 5772 aggiunta 2912 aggiunta 6320 aggiunta 6016
Example Output:
10655