put six on each side first
* F: L1 J6 H* |公仔箱論壇公仔箱論壇- \# N/ M5 @' E2 t. t6 C
from the heavier six, split it to three on each side
7 J6 j. d2 c+ \+ b# U/ ]/ d+ O5 M6 y& B# ^+ G/ D. e5 k0 u8 Q
then there is three left, put one on each side, if one is heavier then that is it, if they are balanced then last one is heavy one |