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: My body throbs with pain all over - an aching pull deep in my calf ; a sharper twinge in my right hip .
Example Output: Original

Example Input: The charging portion of the circuits included solar arrays , hacked into the rooftop of the bridge .
Example Output: Changed

Example Input: So , we found some instances in history where there were questionable things happening , and we were able to hasten them . "
Example Output:
Changed