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: 3719 - 4138 - 7321 - 9097 + 4558 + 9667 + 1909 + 647 - 6132

Output: 13626


Input: Consider Input: 4203 - 2197 - 5419 - 9369 + 4447 - 2386 - 94

Output: 19221


Input: Consider Input: 7835 + 8240 + 5127 + 7600 + 4555 - 6554


Output: -11133