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: 7217 @ 2604 @ 9974 @ 8133 @ 8987 # 6381 # 7662

Output: 22872


Input: Consider Input: 2339 @ 2821 # 2234 @ 1271 @ 471

Output: 4668


Input: Consider Input: 440 @ 5472 # 6900 # 3389


Output: -4377