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: Seconds later it exploded , sending out a spray of small metal rods .
Example Output: Original

Example Input: As they expand they can add more stoves . "
Example Output: Original

Example Input: " I don 't want to dampen your enthusiasm , " Norman said .
Example Output:
Original