12 balls names A B C D E F G H I J K L5 ~' O) b) F9 z( f$ M
1St A B C D : E F G H if balance
5 ^- k" z# q# x" ^+ z8 ?: atvb now,tvbnow,bttvb2nd 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)
2 h( F% I) o7 o. X3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)tvb now,tvbnow,bttvb2 Q7 L3 ~( W0 i, L
L is different |