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: 931 # 9775 @ 8414

Output: -430


Input: Consider Input: 732 # 8451 @ 3249 @ 802 # 4924


Output: -8592