In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Input: Consider Input: 6881 + 1331 - 470 + 6067 - 9323

Output: 9276


Input: Consider Input: 3881 + 3747 + 6493 - 7538

Output: 1179


Input: Consider Input: 3929 + 3158 - 5187


Output: 5958