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: 138 + 3973 - 6085 - 3324 + 6921 + 4411 + 1113 + 8310

Output: -15181


Input: Consider Input: 4110 - 9440 + 557 + 7868 - 6315 + 2518 - 9049 + 3905 + 2052

Output: 12014


Input: Consider Input: 6099 + 2610 + 3318


Output: 171