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.

Example Input: Which direction did the Rhine flow oy no by how much was the North Sea lower in the last cold phase than it is today?
Example Output: disfluent

Example Input: What centuries did the Roman times take place within?
Example Output: proper

Example Input: Who did the Yuan's decrease in commerce help?
Example Output:
proper