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: 2678 # 5467 @ 8355 # 3124 # 5654

Output: -3212


Input: Consider Input: 7806 # 6020 # 4616 @ 3594 # 6312 # 5362 # 4403 @ 3666

Output: -11647


Input: Consider Input: 6454 @ 5519 @ 1871


Output: 13844