   •  !"# •  $!"# •  $%!"# &' Chui 1 Chui 2 Chui 3 () Nhóm A Nhóm B *+ ,- ./ *- 01 ,, *2 ,3 .4 •  !"# •  $!"# •  $%!"# (56 •  !"# •  $!"# •  $%!"#