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: 9354 aggiunta 6738 aggiunta 6894 sottrazione 5513 sottrazione 2239
Example Output: 15234

Example Input: 5184 aggiunta 4099 sottrazione 8262 aggiunta 7301
Example Output: 8322

Example Input: 5682 aggiunta 3980 sottrazione 1240
Example Output:
8422