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'.

1771 sottrazione 9572 aggiunta 643 sottrazione 1370 aggiunta 1931 sottrazione 4381 sottrazione 1690
-12668