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: 2078 + 3891 + 2060

Output: -3873


Input: Consider Input: 3844 - 5783 + 7487

Output: 2140


Input: Consider Input: 8181 - 5768 + 9367 - 9033 + 9464 + 5791 - 6059


Output: 4419