Allan, Bill, Carl, Don, and Ethan went to bar to
have some beer. Allan and Ethan each drunk three different brands of beer.
The rest of them had two different brands of beer from
among the following: Miller, Budwieser, Heineken, Guinness, and Tsingtao.
Allan was the only one who drank Miller.
Bill did not drink Guinness.
Carl did not drink Budwieser.
Don did not drink Heineken.
Ethan was the only one who drank Tsingtao.
Two of them had Budwieser.
Name the brands of beer each of them had.