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: 6927 - 2357 + 8911 - 4674 - 2728 + 9726 - 1304 - 3277

Output: 2630


Input: Consider Input: 3089 - 6778 - 3604 - 1052 - 1332

Output: 15855


Input: Consider Input: 3983 + 1709 + 2257 - 7911


Output: 7928