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: 6284 + 1234 + 9639 + 1470 + 4137 + 9445 + 5309 + 9797 - 4507

Output: -30240


Input: Consider Input: 2167 - 8760 - 4771 - 8633 + 7929 + 9784 + 6892

Output: -274


Input: Consider Input: 467 - 9538 - 1249 - 8486 - 5107 + 2626


Output: 22221