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: The other students were determined to master the representative and then never use it again .
Example Output: Changed

Example Input: Scientific findings , in other words , must hold true for all who investigate any given set of conditions and chicks .
Example Output: Changed

Example Input: This laird was extracted from her memory . "
Example Output:
Changed