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 senators recognized the judges .
The judges recognized the senators .

The president encouraged the professor .
The professor encouraged the president .

The artist helped the banker .

The banker helped the artist .