12 balls names A B C D E F G H I J K L " a9 Z9 L; ]' V; Z# c7 G4 Q i1St A B C D : E F G H if balance 5.39.217.764 l+ L& j9 M2 i n) S- X$ p M
2nd 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)公仔箱論壇5 d5 G' p, d( U7 m; F) a$ C
3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)5.39.217.76. @2 |3 ]' M: E" |; W' I6 x W
L is different