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: 3126 - 612 - 9485 - 3358 + 8070

Output: 8511


Input: Consider Input: 1561 - 5861 - 6887 - 8406 - 5941 - 3633

Output: 32289


Input: Consider Input: 6486 - 693 + 5441 + 2277 + 4253 - 6638 - 3209


Output: 5055