In this task you are given a sentence with one coordinating conjunction (for, and, nor, but, or, yet, and so). You must judge whether the order of two coordinated clausal conjoints have been inverted or not. Inversion would result in the sentence sounding unnatural. Label the instances as "Original" or "Inversion" based on your judgment.

Example Input: The doors opened , and the elevator stopped .
Example Output: Inversion

Example Input: She realized he had fallen to his knees by the side of her bed , and there was a thump .
Example Output: Inversion

Example Input: They kept the surprise from their faces , but he scented their tempers .
Example Output:
Original