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: 8247 - 6987 - 8915 - 9962

Output: 34111


Input: Consider Input: 736 - 6527 - 3681 - 7834 + 893 + 9709 - 7544 - 3726

Output: 19446


Input: Consider Input: 3727 - 3875 - 6179 + 6087 + 633


Output: 7061