Definition: 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'.
Input: 2537 sottrazione 8378 sottrazione 2948 sottrazione 3417 aggiunta 4792 sottrazione 1208 sottrazione 2218
Output:
-10840