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: 9924 @ 6266 # 7022 # 7976 # 2541 @ 5396

Output: 4047


Input: Consider Input: 2653 @ 9718 # 3237 @ 2973 # 6895 # 18

Output: 5194


Input: Consider Input: 6849 # 7939 @ 7302 @ 4644


Output: 10856