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:
5406 @ 9263 @ 7443 @ 6591 # 7496 @ 2721 # 7867

Ex Output:
16061


Ex Input:
5425 @ 6980 # 4301 @ 4410 # 7405 # 552 @ 4556 # 8531 # 4935

Ex Output:
-4353


Ex Input:
5508 @ 3315 # 4338 @ 2463 @ 1299 @ 9932

Ex Output:

18179