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:
We flushed everything else with hydrogen gas and heavily chlorinated water . "

Ex Output:
Changed


Ex Input:
My scolding would have to wait until afternoon .

Ex Output:
Changed


Ex Input:
I felt like in the old days when I was conducting the ceremony at the cathedral .

Ex Output:

Original