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: 6108 + 6734 + 3016 + 637 - 2671 - 5486 - 1133 + 1713 - 2180

Output: 5478


Input: Consider Input: 220 - 5891 + 2603 + 7125 - 7551 - 3288

Output: 7222


Input: Consider Input: 6662 - 4567 - 3376 + 7409 + 4839 - 4220 - 729 + 7817


Output: -511