Classify the input text into either disfluent questions or proper questions. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.

Input: Consider Input: What rituals did Kublai follow to destroy his image?

Output: proper


Input: Consider Input: When three er uh what must be specified in order to account for their effects on the motion of the head?

Output: disfluent


Input: Consider Input: Why was the Kleitman-Aserinsky experiment conducted?


Output: proper