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 never went commando , hiking , climbing , or anything like that in the mountains .

Ex Output:
Changed


Ex Input:
Chalmers shook his head , frustrated by Nightingale 's poor attempt at sundown .

Ex Output:
Changed


Ex Input:
He was gaining ground on the stereo , no doubt about it , but he had been spotted .

Ex Output:

Changed