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: 8571 - 5985 + 8912

Output: 5644


Input: Consider Input: 826 - 6501 - 223 + 9761 - 8863

Output: 6652


Input: Consider Input: 9872 - 4624 + 9452


Output: 5044