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: 8915 @ 8709 # 6716 @ 4326

Output: 15234


Input: Consider Input: 2061 # 9512 @ 2202

Output: -5249


Input: Consider Input: 9333 @ 9310 @ 4018 # 5524


Output: 17137