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: 8324 aggiunta 8333 aggiunta 4114
Example Output: 20771

Example Input: 6742 sottrazione 6935 aggiunta 3384 sottrazione 9973 aggiunta 1923
Example Output: -4859

Example Input: 9300 aggiunta 6236 sottrazione 7638 aggiunta 1945
Example Output:
9843