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.

Ex Input:
What is used to analyze or rather view the properties of crystals?

Ex Output:
disfluent


Ex Input:
What helps the owner in design and construction?

Ex Output:
proper


Ex Input:
IN which etude of Neumes rythmiques does the prime 19 appear in?

Ex Output:

proper