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: My body throbs with pain all over - an aching pull deep in my calf ; a sharper twinge in my right hip .
Example Output: Original

Example Input: " He gave me an obituary .
Example Output: Changed

Example Input: They shot up , they shot down , they swerved to left and right , leaving their stomachs behind them .
Example Output:
Original