12 balls names A B C D E F G H I J K L
: N9 J' D% S0 B1St A B C D : E F G H if balance
1 G4 F& e/ `2 C. d/ I- T2nd A B (or either 2 of A-H) : I J if again balance if A B > I J (implies the different is light ball is I or J)
, e2 H. {) {1 ?' W/ @ I公仔箱論壇3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)
, D) v/ ~. p' ~" w1 I- Q/ L7 o, e5.39.217.77L is different |