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: " Well , your listeners are hopefully already aware of who I 'm sleeping with . "
Example Output: Original

Example Input: " Okay , maybe a thousand , " the man said quickly , backtracking .
Example Output: Original

Example Input: While the bulk of the congregation fidgeted at these words , Isaac nodded along with the sermon like the old folks in the room .
Example Output:
Original