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: " Yeah " I ken .
Example Output: Changed

Example Input: She hadn 't realized that being with someone less perfect , who accepted her and her flaws , would provide more satisfaction in the long run .
Example Output: Original

Example Input: The meteorite was a fake , and this was the proof .
Example Output:
Original