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: 1471 - 7798 + 6514 + 8053 + 9926

Output: -15224


Input: Consider Input: 2759 - 7972 - 7615 + 151

Output: 18195


Input: Consider Input: 9049 - 6438 + 8686 - 910 - 3586


Output: 11297