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: 8711 + 5319 - 3967 - 9285 + 2276

Output: 14368


Input: Consider Input: 4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139

Output: 20686


Input: Consider Input: 7437 - 8471 + 2328 - 3557 - 1978


Output: 19115