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: 8643 @ 7199 @ 504 # 8068 # 8187 # 1584 @ 6422

Output: 4929


Input: Consider Input: 2057 # 2330 # 9059 # 2713 # 7404 @ 4349

Output: -15100


Input: Consider Input: 9430 @ 5762 @ 9381


Output: 24573