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: 8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

Output: 26889


Input: Consider Input: 1470 + 1395 + 3788 + 7517 + 2388 - 431 - 2393 + 4241 - 560

Output: -14475


Input: Consider Input: 9631 - 9088 + 8940 - 2480 - 5029 - 1820 + 9232


Output: 9876