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: 6543 @ 9353 @ 2169 # 4681 @ 6446

Output: 19830


Input: Consider Input: 8041 @ 762 @ 8091 @ 6500

Output: 23394


Input: Consider Input: 8790 # 8384 # 8943 # 5391 @ 6415 @ 9583


Output: 2070