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.

Input: Consider Input: It dribbled from his mouth and from a cut on his cheek .

Output: Original


Input: Consider Input: " We need to do our human testing , don 't want to have any more deliveries by waiting for vaccination of a test subject .

Output: Changed


Input: Consider Input: I convinced the QT directors we needed to continue the drug research , but I hid your membership in as much paperwork as I could .


Output: Changed