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: On our way out , we walk through the rec room in which I faced my fear landscape .
Example Output: Changed

Example Input: Once more the cockroach climbed his stand .
Example Output: Changed

Example Input: He got another surprise when , at the next round , they had to sing a predetermined song for the kidnappers .
Example Output:
Changed