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:
That is all IT is ... beat the competition ... ' ' Naturally ... by co-operating in mutual enhancement ? '

Ex Output:
Changed


Ex Input:
Alan stepped toward Marcus , the barrel of the AR-15 digging into his cassock .

Ex Output:
Changed


Ex Input:
It was to be the icon of the Easter Square Incident .

Ex Output:

Original