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:
It takes very little energy , and it 's an easy way to motivate people to do things .

Ex Output:
Original


Ex Input:
The kitchen cupboards are emptied and hang open .

Ex Output:
Original


Ex Input:
My first day at work , and I 'd just sparred with my fiance on the phone for almost ten minutes at lunch .

Ex Output:

Original