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: 2297 + 4208 + 9691 - 6995 + 738 + 1245 - 7806

Output: 1216


Input: Consider Input: 7312 - 1598 - 5813 - 8994 + 9174 - 4767 + 4076

Output: 15234


Input: Consider Input: 2899 - 7093 - 9292 + 3867 - 4886 - 8865


Output: 29168