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: 6292 sottrazione 9049 aggiunta 3901
Example Output: 1144

Example Input: 967 sottrazione 9865 aggiunta 6559 aggiunta 1788 sottrazione 6955 aggiunta 5236
Example Output: -2270

Example Input: 1349 sottrazione 2352 aggiunta 7281 aggiunta 2124
Example Output:
8402