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.

Example Input: 6439 - 6685 + 6156 - 3314 + 6845 - 6872
Example Output: 10309

Example Input: 8455 + 5516 - 2131 + 6151 + 6314 + 9308 + 5493
Example Output: -22196

Example Input: 8666 + 9262 - 9558 + 9336 + 4984 - 6533 - 6165 + 2432
Example Output:
4908