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.
--------
Question: They were hard to read compared with digital notebooks .

Answer: Changed


Question: " That hurt like hel . "

Answer: Original


Question: Gradually , he felt the motor beginning to move with much more speed , until , at length , it was fairly flying upon some motorway .

Answer:
Original