put six on each side first6 |: N7 ~/ F: {9 i* e! p/ E) Y9 X
# ~: }, V0 V: W) [& _3 M! e1 Kfrom the heavier six, split it to three on each side 3 ?# K' |" l" r. ^2 a9 Z公仔箱論壇2 ^/ u# n" A _
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