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: 5444 + 2542 - 6861 + 2740 - 4508 + 478 - 1138 + 7229

Output: 4962


Input: Consider Input: 8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171

Output: 11988


Input: Consider Input: 6868 - 2441 + 5127 - 8692 + 9561 - 132 + 4477 - 9939 + 6880


Output: 2027