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: 4428 # 2569 @ 338 # 967 @ 2206

Output: 3436


Input: Consider Input: 2416 @ 4557 @ 9089 @ 8858

Output: 24920


Input: Consider Input: 7669 @ 9604 # 7740 @ 633


Output: 10166