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.

The professor behind the scientists helped the lawyer .
The scientists helped the professor .

The professor encouraged the student next to the manager .
The student encouraged the professor .

The athletes behind the author supported the presidents .

The presidents supported the author .