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: He was camouflaged so well , Neil hardly noticed him .
Example Output: Original

Example Input: Late at night on their second full day they sat and waited for a modification .
Example Output: Original

Example Input: Those faces promised all his days were condemned to be served out in a tortured living hell .
Example Output:
Original