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: She slouched and rubbed the bridge of her nose .
Example Output: Original

Example Input: The invitation into the computer room was the straw that broke the camel 's back .
Example Output: Original

Example Input: I would prefer demonstration over lecture , but I 'll let the choice be yours . "
Example Output:
Original