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: " Of course she knew all about pottery . "
Example Output: Original

Example Input: He tapped on the overhead display to awaken it and then displayed a digital diagram .
Example Output: Original

Example Input: You had an expired packet in your medicine cabinet , however , with two unused tablets .
Example Output:
Original