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: Consider Input: 543 aggiunta 3325 sottrazione 2566 aggiunta 4472 sottrazione 980

Output: 4794


Input: Consider Input: 6766 sottrazione 7608 aggiunta 4336 sottrazione 8607

Output: -5113


Input: Consider Input: 5644 aggiunta 6385 sottrazione 626


Output: 11403