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: 3615 @ 7429 @ 6810 # 207 @ 1232 # 5621 @ 6745

Output: 20003


Input: Consider Input: 6607 @ 8561 @ 5571 # 6468 @ 8173 # 7134 @ 2102 # 7688

Output: 9724


Input: Consider Input: 2193 # 3346 @ 6373 # 7056


Output: -1836