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: 2837 + 8737 + 9015 - 7647 - 1903 - 3427 - 2034 - 3680 - 8565

Output: 12341


Input: Consider Input: 3186 + 271 - 7916

Output: 10831


Input: Consider Input: 2492 + 3053 - 8536


Output: 7975