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: 9889 @ 8457 # 4692

Output: 13654


Input: Consider Input: 4428 # 2569 @ 338 # 967 @ 2206

Output: 3436


Input: Consider Input: 2808 @ 9510 # 4684 @ 8160 # 7003 # 6631 # 9199 # 455


Output: -7494