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 bankers avoided the artist who introduced the president .
The artist avoided the the president .

The authors behind the doctors advised the banker .
The banker advised the doctors .

The presidents in front of the doctor supported the student .

The student supported the presidents .