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: " Almost everything is paid for with vouchers or coupons that you buy from a guard . "
Example Output: Original

Example Input: There is an odd undertone of fear in her voice , which piques my curiosity and concern .
Example Output: Original

Example Input: " It 's good to feel like a dork once in a while .
Example Output:
Original