In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Input: Consider Input: 8603 @ 6832 @ 2275 # 7856

Output: 9854


Input: Consider Input: 9504 # 5838 @ 6008 @ 5759 @ 2689

Output: 18122


Input: Consider Input: 8715 # 3422 # 7307 # 6296 # 7702 @ 6141 # 6308 @ 7703


Output: -8476