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:
" I 'm pissing you .

Ex Output:
Changed


Ex Input:
El Cid was a cog in the wheel , fighting between Christians and Muslims who serve the same deity .

Ex Output:
Original


Ex Input:
' As part of my engineering corporation I 've been studying the schematics of the ARC .

Ex Output:

Changed