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 each side of the head , near the ears , grew an antenna through which it tagged with others .
Example Output: Changed

Example Input: Everyone was up by the time we got back , and most were already in their bathing suits and working on their tans .
Example Output: Original

Example Input: Cruising was the equivalent of pointing the ship at a random star and just letting it probe itself there before picking another and repeating the process .
Example Output:
Changed