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: 1589 + 4479 - 6111 - 3158 - 7662

Output: 14041


Input: Consider Input: 5299 - 8968 + 5239 + 1119

Output: 7909


Input: Consider Input: 4321 - 2387 - 6206 + 1637


Output: 11277