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: 8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Output: 4011


Input: Consider Input: 7930 - 2835 - 1925 - 6613

Output: 19303


Input: Consider Input: 9712 + 2185 + 1600 - 4742 + 9137 - 8322 - 604 + 6975 - 4606


Output: 8089