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 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 Western boots were retained to a shine , and two pistols hung low at his side .
Example Output: Changed

Example Input: That solved the problem of confronting him .
Example Output:
Changed