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: 4148 + 9216 - 5756 - 5558 + 2801 - 7501 + 1939 + 3102 + 6894

Output: -989


Input: Consider Input: 4325 + 2332 + 1470 - 1881 + 9204 - 2529 - 5460 + 5554

Output: -4365


Input: Consider Input: 9717 + 8470 - 2695 - 282 + 3864 - 5747 - 7166 + 3919 - 8872


Output: 18226