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.

Q: The scientist in front of the professor thanked the bankers .

A: The professor thanked the scientist .
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Q: The student avoided the scientists who called the lawyers .

A: The scientists avoided the student .
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Q: The president encouraged the professor .

A:
The professor encouraged the president .
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