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: 5618 aggiunta 3775 sottrazione 6021 sottrazione 3182 aggiunta 1427 aggiunta 7105 aggiunta 75 aggiunta 1039 aggiunta 9874
A:
19710