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: 1982 # 4772 # 2392 # 1023 # 9072 @ 1042 @ 2606 # 2557 @ 1145

Output: -13041


Input: Consider Input: 5893 # 9406 @ 5830 # 464


Output: 1853