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: 4134 aggiunta 7153 sottrazione 3755 sottrazione 3655 sottrazione 8665 aggiunta 7799 sottrazione 5108

Output: -2097


Input: Consider Input: 989 aggiunta 1879 aggiunta 5578

Output: 8446


Input: Consider Input: 239 aggiunta 4358 aggiunta 6563


Output: 11160