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 manager behind the author thanked the artist .
The artist thanked the manager .

The judges thanked the professor in front of the authors .
The authors thanked the judges .

The scientist that the student encouraged helped the author .

The author helped the scientist .