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:
And how come you are familiar with the infirmary ?

Ex Output:
Changed


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

Ex Output:
Original


Ex Input:
I have to risk a possible breach in the hope of unpacking to you the weight of the responsibility with which you have been entrusted .

Ex Output:

Changed