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

Câu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

TL B C C D D A D B C C A A D A C B