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:
A hard lecturing , and it was taking Marian longer to recover .

Ex Output:
Changed


Ex Input:
" I tripped on one of those grenades you were talking about , " Daniel said .

Ex Output:
Changed


Ex Input:
I bit off a piece of my thumbnail and spit it out .

Ex Output:

Original