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 secretaries in front of the tourists saw the judge .
The judge saw the tourists .

The secretary helped the judge that the scientists believed .
The judge helped the scientists .

The professors thanked the judges by the artist .

The judges thanked the professors .