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.

Ex Input:
Seconds later it exploded , sending out a spray of small metal rods .

Ex Output:
Original


Ex Input:
He used to spend hours perfecting the old books . "

Ex Output:
Changed


Ex Input:
Drew had worked as a carpenter to put himself through college , earning a 4.0 GPA while barely having time to sleep .

Ex Output:

Original