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: 8625 - 7177 + 4191

Output: 11611


Input: Consider Input: 6894 + 3927 + 7884 - 4132 - 6563 + 4281

Output: 1497


Input: Consider Input: 8623 - 8020 + 5742 - 3555 + 6642


Output: 7814