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: I know where we can have a shootout with some cops !
Example Output: Original

Example Input: He returned every lick , every nip .
Example Output: Original

Example Input: " Perhaps I 'd better bring in some firewood , " he said .
Example Output:
Original