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: 556 + 5223 - 5888 + 4866

Output: -3645


Input: Consider Input: 2036 + 7313 - 8908 - 1870 - 5159 + 5945 + 5006 + 635 + 5551

Output: -6477


Input: Consider Input: 4149 + 8710 + 2521 + 4254


Output: -11336