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: 2443 + 7109 + 4711

Output: -9377


Input: Consider Input: 8635 - 7524 + 4693


Output: 11466