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: 1767 @ 7166 @ 1543 @ 1185 @ 9966 # 6628

Output: 14999


Input: Consider Input: 7224 @ 2882 # 584 @ 8420 # 499 # 789 # 5209 @ 5700 # 1874


Output: 15271