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 bankers who the actor saw contacted the tourists .
The tourists contacted the actor .

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

The banker next to the professors encouraged the judges .

The judges encouraged the banker .