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: 2596 + 8164 - 6385 + 6704

Output: -5887


Input: Consider Input: 220 - 5891 + 2603 + 7125 - 7551 - 3288

Output: 7222


Input: Consider Input: 4860 - 7511 - 8525


Output: 20896