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: 4226 - 3951 + 2613

Output: 5564


Input: Consider Input: 3583 - 967 - 3552 + 7898 - 1248 + 6992 - 5291 + 819

Output: -1068


Input: Consider Input: 7608 - 4831 + 5557


Output: 6882