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: 6628 @ 7709 @ 528 @ 8813

Output: 23678


Input: Consider Input: 1380 @ 6582 # 4036

Output: 3926


Input: Consider Input: 5446 # 9993 # 1289


Output: -5836