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: 9689 - 3967 - 2592 - 3020 - 6589

Output: 25857


Input: Consider Input: 3129 - 7101 - 6763 + 9310 + 4977

Output: 2706


Input: Consider Input: 681 - 9392 + 1414


Output: 8659