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: 8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

Output: 26889


Input: Consider Input: 3677 + 3282 + 6324 + 6039 + 2578 - 7896 + 671 + 4192

Output: -11513


Input: Consider Input: 9339 + 6236 - 9350 - 2151


Output: 14604