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: 1215 aggiunta 4628 aggiunta 2825

Output: 8668


Input: Consider Input: 2347 sottrazione 224 aggiunta 5509 aggiunta 3753 aggiunta 7232

Output: 18617


Input: Consider Input: 4084 sottrazione 1274 sottrazione 5034 sottrazione 5747


Output: -7971