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: 672 sottrazione 4404 aggiunta 5593 aggiunta 7193 aggiunta 7968
Example Output: 17022

Example Input: 293 aggiunta 9091 aggiunta 4213
Example Output: 13597

Example Input: 2181 sottrazione 9769 sottrazione 7170 aggiunta 928
Example Output:
-13830