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: 6800 + 2564 + 8444 + 1912

Output: -6120


Input: Consider Input: 9990 - 8613 - 152 + 4529

Output: 14226


Input: Consider Input: 2383 - 6766 - 8395 - 9319


Output: 26863