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: 10 sottrazione 7
Example solution: 3
Example explanation: Here, 'sottrazione' represents the subtraction operation. So, the answer is 3 (10-7=3).

Problem: 5221 aggiunta 4406 sottrazione 9293 sottrazione 5760 sottrazione 449 sottrazione 1234 aggiunta 8143 aggiunta 7242 aggiunta 8678

Solution: 16954