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: Humans outnumber us , Sali , and it confuses things .
Example Output: Original

Example Input: The thick sweet scent of illumination spilled from the half-open door into the foyer .
Example Output: Changed

Example Input: Diplomats and military labs were traveling in from around the world .
Example Output:
Changed