2 3 4 5 6 7 8 9 10 11 12 13 14 15 16TL B A B B C D A C C B D B B...

Câu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16TL B A B B C D A C C B D B B C C A