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: " There is no great-aunt , " Mat said with exasperation .
Example Output: Original

Example Input: It makes a satisfactory clang in the silence and I turn to Adrian .
Example Output: Original

Example Input: They got out of the truck and began walking slowly down the rows of painkillers .
Example Output:
Changed