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: And his eyes were so warm and brown they didn 't seem to match his stiff opposition .
Example Output: Changed

Example Input: After the delirium took it for many days , so many nights , even factors could calm her down .
Example Output: Changed

Example Input: It was tough work updating the steep banks while scrutinising the waters at the same time .
Example Output:
Changed