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: 8997 @ 8611 # 604 @ 1810 # 1906 @ 5956

Output: 22864


Input: Consider Input: 2339 @ 2821 # 2234 @ 1271 @ 471

Output: 4668


Input: Consider Input: 8442 @ 8585 # 7842 # 8932 @ 685 # 2237 # 8724


Output: -10023