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.

Input: Consider Input: The author helped the professor .

Output: The professor helped the author .


Input: Consider Input: The author stopped the secretaries .

Output: The secretaries stopped the author .


Input: Consider Input: The students stopped the judge who the presidents recommended .


Output: The presidents stopped the students .