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 clean lavatory in breastplate . "
Example Output: Changed

Example Input: He stilled , his muscles cramping from strain .
Example Output: Changed

Example Input: His thumb and forefinger aroused the distended bladder .
Example Output:
Changed