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: 7729 aggiunta 1253 aggiunta 2215 aggiunta 8543 sottrazione 5919 sottrazione 3070 aggiunta 7122 sottrazione 8445
A:
9428