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: 1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023

Output: 18543


Input: Consider Input: 8923 + 2051 + 329 - 4196 - 5114 - 5210 - 260


Output: 21323