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: 7924 @ 8575 # 3974 @ 6720

Output: 19245


Input: Consider Input: 6896 @ 8548 @ 1670 @ 7550 # 921

Output: 23743


Input: Consider Input: 9285 # 5492 @ 6629 # 5477 @ 5969 # 8754


Output: 2160