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: 8581 sottrazione 8888 aggiunta 5725 aggiunta 8206 sottrazione 7396 aggiunta 9654 aggiunta 4898
A: 
20780