2 3 4 5 6 7 8 9 10 11 12 13 14 15ĐA B C A B A B C A D C B A B C...

Câu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15ĐA B C A B A B C A D C B A B C B