12 balls names A B C D E F G H I J K L
7 y' q; v! T/ p* b& L6 I3 K1St A B C D : E F G H if balance
8 S+ l7 E8 u, \) S" `7 {* W5.39.217.772nd 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)
& i5 j7 D8 ?8 z9 S5 F5.39.217.773rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)
& D' B3 ^, X* g3 e: j( k5.39.217.77L is different |