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:
He used to spend hours perfecting the old books . "

Ex Output:
Changed


Ex Input:
The people of the villages , fearing the shadows that threaten their homes , begin to put their trust in hand-made trinkets .

Ex Output:
Original


Ex Input:
The ghost turned to the chalkboard , and letters formed in thin white strokes .

Ex Output:

Original