In this task, you are given a premise sentence. Your task is to write a new sentence by substituting the subject and object (i.e., the input's subject should be output's object and vice versa.). The generated sentence must be fluent and shouldn't change the voice (i.e., passive or active) of the input.

Example Input: The senator thanked the secretaries .
Example Output: The secretaries thanked the senator .

Example Input: The presidents in front of the senator avoided the lawyer .
Example Output: The senator avoided the presidents .

Example Input: The artist who saw the actor believed the professor .
Example Output:
The professor believed the actor .