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 pressure on my mind unraveled .

Ex Output:
Changed


Ex Input:
She 'd spent her childhood sleeping in nooks , lairs , or alleys .

Ex Output:
Original


Ex Input:
He 's powerful enough to cause natural disasters that kill millions , but Africa isn 't close enough to Greece to be a problem . "

Ex Output:

Original