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 president helped the secretary .
Example Output: The secretary helped the president .

Example Input: The lawyer near the actors stopped the athlete .
Example Output: The actors stopped the lawyer .

Example Input: The scientist in front of the professor thanked the bankers .
Example Output:
The professor thanked the scientist .