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: 10 sottrazione 7
Example output: 3
Example explanation: Here, 'sottrazione' represents the subtraction operation. So, the answer is 3 (10-7=3).
Q: 8746 aggiunta 1539 aggiunta 5739 aggiunta 5623 sottrazione 1978 aggiunta 4889 sottrazione 9859 sottrazione 9586
A:
5113