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: He tapped on the overhead display to awaken it and then displayed a digital diagram .
Example Output: Original

Example Input: The two VPs twitched a bit , clear puddles of their relief .
Example Output: Changed

Example Input: Victor shook his head in disagreement but he said nothing .
Example Output:
Original