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

Example Input: They 'd had no word of Marianne since their abduction ... the lack of knowledge gnawed at her driving her crazy with worry . .
Example Output: Original

Example Input: Concentrating on the pile of rubble , he felt the new force well up into his gut like a circumstance .
Example Output:
Changed