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: 2588 + 7474 + 7336 + 2767 - 1155 - 3435 - 6693

Output: -3706


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

Output: -6786


Input: Consider Input: 8914 - 5175 - 6907 - 2704


Output: 23700