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: A loudspeaker called out for everyone to pile on board in an orderly fashion .
Example Output: Original

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

Example Input: It is no mere guard or distrust , but Julian .
Example Output:
Changed