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: 9483 sottrazione 8559 sottrazione 233
Example Output: 691

Example Input: 2363 aggiunta 6410 aggiunta 2443
Example Output: 11216

Example Input: 9487 sottrazione 15 aggiunta 5743 aggiunta 9171 sottrazione 2622 aggiunta 1890
Example Output:
23654