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 athletes thanked the tourist .
The tourist thanked the athletes .

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

The actor helped the athletes .

The athletes helped the actor .