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: 3968 + 5044 + 8713

Output: -9789


Input: Consider Input: 9713 + 8053 - 1782 + 6126 + 5918 + 968 - 2071 - 879 + 558

Output: -7178


Input: Consider Input: 2456 + 7407 + 9769 - 5982 - 9187


Output: 449