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: If anyone was talking in riddles , it was Foley .
Example Output: Original

Example Input: May I return to my harmless query ? "
Example Output: Changed

Example Input: The metamorphosis happened in an instant .
Example Output:
Original