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: 4287 + 3355 + 4251 + 7433 + 7069

Output: -17821


Input: Consider Input: 2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Output: 14737


Input: Consider Input: 1332 + 8295 + 7000 - 829 + 8637 + 1253 - 154


Output: -22870