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

Ex Input:
7295 @ 8477 @ 8646 @ 3487 # 114 # 9184

Ex Output:
18607


Ex Input:
8422 @ 5670 # 5825 @ 3613

Ex Output:
11880


Ex Input:
7389 # 894 @ 7937 # 5600

Ex Output:

8832