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:
He had to be proactive , because being reactive would only end up in chaos , arrests , and more shit than he wanted to deal with .

Ex Output:
Original


Ex Input:
There were no streetlights , so there was damn little to see and no landmarks she could describe to someone else .

Ex Output:
Original


Ex Input:
There were humans on the fringes , waiting and watching with barely concealed contempt .

Ex Output:

Original