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: 9407 @ 4324 # 2220 # 8668 @ 1606 @ 4059

Output: 8508


Input: Consider Input: 6203 # 8978 # 1139 @ 240 # 4716

Output: -8390


Input: Consider Input: 7509 # 1098 @ 5372


Output: 11783