12 balls names A B C D E F G H I J K L
/ i" C. @( ]4 M9 n4 E2 o2 rtvb now,tvbnow,bttvb1St A B C D : E F G H if balance ' g/ Y0 }1 v& r# F0 e" l. Z$ E( G
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)' |5 ?3 w9 G X6 ~+ `4 d
3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)tvb now,tvbnow,bttvb d9 O/ a0 C! S: J/ l8 J
L is different |