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 senator encouraged the tourist in front of the judge .
The judge encouraged the senator .

The doctor mentioned the judges .
The judges mentioned the doctor .

The judge by the lawyer called the president .

The president called the judge .