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: 8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

Output: 11924


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

Output: 4011


Input: Consider Input: 5945 + 1046 + 9187 + 929


Output: -5217