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: It was titled : Riddle of the Pink Pyjamas The writing was hard to make out .
Example Output: Original

Example Input: " It sounds like you are very anxious to grow up , " Jason observes .
Example Output: Original

Example Input: If they were diminishing , then it wouldn 't be long before they would be able to actively seek out the places where the uninfected were hiding .
Example Output:
Changed