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 athlete recognized the banker .
The banker recognized the athlete .

The actor that recommended the judge introduced the secretary .
The secretary introduced the judge .

The students helped the author .

The author helped the students .