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: Instead of pinching his nose , he 's smiling at us .
Example Output: Original

Example Input: Shake the milk and witchcraft the kid if you want to keep your suit clean . "
Example Output: Changed

Example Input: Soon , the camp was filled with small balls of fire and small measures of awe and celebration with every fallen rodent .
Example Output:
Original