B. Hello, Mai. I have just read a book entitled "The ethnic groups of Vietnam."  
D. Hi, Long. It's great. Can you tell me something about it?  
K. That's interesting. I really want to know more about what you've read in the informative book, but I have to leave here now. Will you still tell me about it tomorrow?  
A. I think it's Odu group.  
H. Do you know which ethnic group has the largest population and what its population is? I haven't ever heard this ethnic group before. Do the Odu mainly live in the western provinces in the South of Vietnam?  
O. No, they don't. They mostly live in Nghe An province.  
C. It's the Viet or Kinh with over seventy millions according to its research in 2013.  
G. The Kinh has the largest population, so which is the smallest ethnic group in Vietnam, Long?  
E. How many people are there in the Odu minority group?  
N. It's about three hundred people.  
L. You are welcome.  
F. Bye, Mai. See you tomorrow.  
M. Bye. See you soon.