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: 8422 @ 5670 # 5825 @ 3613

Output: 11880


Input: Consider Input: 581 # 2278 @ 452 # 5411 # 7564 @ 8148 # 2350 # 8956 # 4877

Output: -22255


Input: Consider Input: 844 @ 298 # 1227


Output: -85