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: 8137 + 5006 - 7743 + 1478

Output: 9396


Input: Consider Input: 509 + 4840 + 5618 + 9163 + 802

Output: -19914


Input: Consider Input: 3864 + 9742 + 1089 - 9360 + 2538 - 9610 + 3658 - 9467


Output: 15274