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: 7244 sottrazione 8940 sottrazione 934
Example Output: -2630

Example Input: 92 aggiunta 2204 aggiunta 9658 aggiunta 7726 sottrazione 9473
Example Output: 10207

Example Input: 2463 aggiunta 3659 aggiunta 3791
Example Output:
9913