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: You radioed in ; you received permission to terminate your watch .
Example Output: Original

Example Input: " Books of them .
Example Output: Changed

Example Input: But then why smother her ?
Example Output:
Original