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 professor that the lawyers thanked introduced the presidents .

Output: The lawyers introduced the professor .


Input: Consider Input: The secretaries stopped the presidents .

Output: The presidents stopped the secretaries .


Input: Consider Input: The tourist helped the artists by the professor .


Output: The artists helped the professor .