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: But the alternative is a whole can of worms I flinch at the thought of opening .
Example Output: Original

Example Input: ' We 're at the end of the wharf , father .
Example Output: Original

Example Input: His words stiffened her spine and she couldn 't call back the glare as she provoked him with her gaze .
Example Output:
Changed