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: 7027 @ 2812 @ 3081 @ 8945 # 18 # 3273 @ 222 # 6452 # 5838

Output: 6506


Input: Consider Input: 4264 # 4438 @ 3871 @ 7585 # 540 # 3455 # 6016

Output: 1271


Input: Consider Input: 4117 @ 4643 # 6990 @ 2521


Output: 4291