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: 9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794

Output: 8174


Input: Consider Input: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Output: 18149


Input: Consider Input: 7265 + 7523 - 2966 - 9833 - 4458 - 3941


Output: 20940