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: 2184 sottrazione 9076 aggiunta 4754
Example Output: -2138

Example Input: 9187 sottrazione 5498 aggiunta 9547
Example Output: 13236

Example Input: 3968 aggiunta 2285 sottrazione 8493 sottrazione 7386
Example Output:
-9626