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: Late at night on their second full day they sat and waited for a modification .
Example Output: Original

Example Input: There were pages and pages of legalese which he skimmed before reaching the final document : a financial summary detailing the assets they had to liven up .
Example Output: Changed

Example Input: We know from our previous conquests that you do have some control , but what we don 't know is the extent of your abilities .
Example Output:
Changed