12 balls names A B C D E F G H I J K L + n9 {' R2 X2 T( O) wwww3.tvboxnow.com1St A B C D : E F G H if balance ' l. D$ j% L/ M U$ x2nd 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) ) |4 t* x- q2 w* Z# D% ]$ n- h3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different) # _7 m0 X. _% I3 X- mL is different