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:
The rock face was steep , but provided many hand and footholds to aid in climbing .

Ex Output:
Original


Ex Input:
There were several messengers in the eastern part of Tennessee , strewn across the crooked edge of the state like minefields in its history .

Ex Output:
Changed


Ex Input:
He cursed his cowardice and went to stand beside the cactus .

Ex Output:

Original