put six on each side first
7 g% Z0 M- _: n! Gtvb now,tvbnow,bttvb
: S% G$ Z E& M& a! v- ~( b. \from the heavier six, split it to three on each side
! K% R2 h1 q. o4 Mtvb now,tvbnow,bttvb7 I* a( |3 D/ D% D a: u; c
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 |