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 Big Man pointed to a couple elves who 'd spent most of the trip napping in the back of the rainstorm .
Example Output: Changed

Example Input: She presented him with her back and it was all Jason could do to pull the tab up instead of down .
Example Output: Original

Example Input: She smiled as he utilized the signal .
Example Output:
Changed