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: 2596 + 8164 - 6385 + 6704

Output: -5887


Input: Consider Input: 8769 - 3041 - 6567 + 1136 + 3380 + 4191 + 2049 + 7794 - 4291

Output: 4118


Input: Consider Input: 1261 + 3577 - 4386 - 8037 - 5727 - 8867


Output: 24701