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: 2167 - 8760 - 4771 - 8633 + 7929 + 9784 + 6892

Output: -274


Input: Consider Input: 4224 - 9761 - 8262 + 6568 - 5026 + 916 - 5225 - 2454 - 1897

Output: 29365


Input: Consider Input: 5024 - 3783 - 3222 + 7799 - 5760 + 9119 - 3163 + 8411 + 3643


Output: -8020