12 balls names A B C D E F G H I J K L# M) c- f2 V' |5 a7 ~ e
1St A B C D : E F G H if balance 0 G4 X0 R- p# R* @/ Q# H! _) N8 Z
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) + x8 [; d8 j& ~" \2 X: K3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different) - Q6 _$ N. B! k# NL is different