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 about to blot on the greatest adventure of his life .
Example Output: Changed

Example Input: He could not answer those questions without resenting the sudden and final end to his career as a law enforcement officer .
Example Output: Changed

Example Input: His knuckles were just about to rap against the door before it swung open with Kelly in the doorway .
Example Output:
Original