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: 556 + 5223 - 5888 + 4866

Output: -3645


Input: Consider Input: 2010 + 6744 - 5577 - 1182 + 8811

Output: -6786


Input: Consider Input: 6627 + 3192 + 3813 - 4495


Output: 4117