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: 6054 - 4121 + 5615

Output: 4560


Input: Consider Input: 3282 - 7921 - 9296 + 8324 + 6283


Output: 5892