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 Q]: I replied with a smiling face , it was a common thing among us ; replying a question with another .
[EX A]: Original

[EX Q]: He lets his right hoof hit the bag .
[EX A]: Changed

[EX Q]: They all were rough and worn down , their eyes holding too much experience and protein for their age .
[EX A]:
Changed