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: 3816 @ 8163 # 9273 @ 2037 @ 8051 @ 826

Output: 13620


Input: Consider Input: 8769 @ 9595 # 7775 # 3412 # 7 @ 4689 # 4368

Output: 7491


Input: Consider Input: 8104 # 6068 @ 6551 # 8747 # 2654


Output: -2814