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: 475 sottrazione 53 sottrazione 7230 aggiunta 8312 sottrazione 3261 sottrazione 5332
Example Output: -7089

Example Input: 157 sottrazione 9421 aggiunta 4925
Example Output: -4339

Example Input: 7847 sottrazione 7096 aggiunta 7068
Example Output:
7819