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: 1370 sottrazione 7268 sottrazione 7735
Example Output: -13633

Example Input: 1081 aggiunta 3923 aggiunta 4772
Example Output: 9776

Example Input: 1784 sottrazione 3009 aggiunta 5476 aggiunta 8421 aggiunta 5270
Example Output:
17942