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: 9487 # 9520 @ 4047

Output: 4014


Input: Consider Input: 6312 @ 1446 # 1616 @ 6758 # 9137 @ 6041

Output: 9804


Input: Consider Input: 4506 @ 6924 @ 9360 @ 3205 # 977


Output: 23018