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: 1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549

Output: 4259


Input: Consider Input: 1808 - 5352 - 8697 + 5058 + 8777 + 8089 - 9688 + 9784

Output: -6163


Input: Consider Input: 840 + 3567 - 9054 + 1900 - 6913 - 3831 + 7978 + 1794 + 8698


Output: -3299