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: 595 aggiunta 2774 sottrazione 9705 aggiunta 7958 sottrazione 7948 aggiunta 8539 sottrazione 5440 aggiunta 8934 sottrazione 3837
A:
1870