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: 7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Output: 21781


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

Output: 7222


Input: Consider Input: 1838 - 3236 - 7652 + 1509 - 5613 - 8990 + 6295 - 1408 + 7965


Output: 12968