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: Seconds later it exploded , sending out a spray of small metal rods .
Example Output: Original

Example Input: The pressure on my mind unraveled .
Example Output: Changed

Example Input: After a few weeks , they quit crying and begging for their parents , and she enjoyed reliving them .
Example Output:
Changed