In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.

Example Input: The footmen looked relieved when they came into sight .
Example Output: Original

Example Input: You 've certainly learnt a lesson , the submarine will be very interested in you . "
Example Output: Changed

Example Input: The males often accept and even pride themselves in donning the role of a provider , even when their essential nature has to be of nurturer .
Example Output:
Original