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: 2167 # 8760 # 4771 # 8633 @ 7929 @ 9784 @ 6892

Output: 4608


Input: Consider Input: 932 # 7028 @ 5402 # 9015 @ 2110

Output: -7599


Input: Consider Input: 9657 # 4430 # 3358 # 7125


Output: -5256