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: 6312 @ 1446 # 1616 @ 6758 # 9137 @ 6041

Output: 9804


Input: Consider Input: 4867 # 7162 @ 1616 # 596 # 7845 @ 9594 # 3650 @ 6833

Output: 3657


Input: Consider Input: 8650 @ 3789 # 1988 # 605 @ 7900 # 6266 @ 2489 # 1006 @ 8953


Output: 21916