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: 9051 - 8971 + 6555 - 1135 - 4091 + 9374 + 9487 + 1868

Output: -4036


Input: Consider Input: 6051 + 6310 + 7813 + 2282 - 7601 + 4598 - 1928 - 9696 - 6497

Output: 10770


Input: Consider Input: 5621 + 1142 + 6069 + 4217 + 4164 - 7433


Output: -2538