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.

Example Input: I grabbed my weapons , sheathed them , and reverted back to my normal form .
Example Output: Original

Example Input: Something was off this time ; I could almost feel the heaps .
Example Output: Changed

Example Input: The next task was to call Mike , and inform him of the problem , she knew she was going to have to play peacemaker , again .
Example Output:
Original