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 artists admired the president .
The president admired the artists .

The authors behind the athletes encouraged the secretaries .
The secretaries encouraged the athletes .

The bankers behind the professors introduced the athletes .

The professors introduced the bankers .