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: 3651 @ 4392 @ 7612 # 1575 @ 8307

Output: 22387


Input: Consider Input: 3586 # 8254 # 4130 # 5426

Output: -14224


Input: Consider Input: 3125 @ 2840 # 8070 @ 6355 # 1581


Output: 2669