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 presidents stopped the bankers .
The bankers stopped the presidents .

The judges who helped the authors supported the professors .
The professors supported the judges .

The doctor who thanked the student supported the lawyers .

The lawyers supported the student .