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: 6646 + 4878 - 8881 - 992 + 7276

Output: 4365


Input: Consider Input: 933 - 48 - 7218 - 7880 - 4299

Output: 20378


Input: Consider Input: 4265 - 2221 - 1108 + 9117 + 9819


Output: -11342