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: 2977 - 4470 - 76 + 164 + 8433 - 2054 - 4953

Output: 5933


Input: Consider Input: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183

Output: -12917


Input: Consider Input: 4211 + 5336 + 5917 + 3327 + 9938 - 2357


Output: -17950