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'.
Q: 9529 aggiunta 7358 sottrazione 6556 aggiunta 2895 sottrazione 3164 aggiunta 9854 aggiunta 521 sottrazione 4856
A: 
15581