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: The singsong voice froze Holly in her tracks .
Example Output: Changed

Example Input: My tongue flicks out and runs inside her low-cut shirt and bra , reaching until it flicks against her nipple .
Example Output: Original

Example Input: Paul returned the transmission to park and awaited a rendezvous with the man .
Example Output:
Original