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: 3129 - 7101 - 6763 + 9310 + 4977

Output: 2706


Input: Consider Input: 7539 + 9207 - 2938 + 8942 + 6293 - 563


Output: -13402