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: 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 would make a great diplomat .
Example Output: Original

Example Input: Nora was staring at the book with incredulity .
Example Output:
Original