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: 1344 + 7632 - 4322

Output: -1966


Input: Consider Input: 8571 - 5985 + 8912

Output: 5644


Input: Consider Input: 1246 - 4890 - 1978


Output: 8114