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: 6570 + 2902 + 9219 - 6971 + 6886 + 765

Output: -6231


Input: Consider Input: 8739 - 8064 - 7000 + 6709

Output: 17094


Input: Consider Input: 1044 - 7306 - 1283 - 6240 - 134 + 7429 + 5685


Output: 2893