6 at a side for first
4 D2 ~' S- w8 S5 Ywhich 1 heavietvb now,tvbnow,bttvb' _1 G5 U0 W3 N h X
then 3 by the side) s" t( S2 I( n+ ?7 c& @
u know which 1 heavie公仔箱論壇& F) V3 x: G& p2 C6 J! r
left 3 pick 2' f l" b2 Z7 j
if balance then the third 1 is the asnwer if not balance the 1 u can guess la...|tvb now,tvbnow,bttvb: z5 w9 E' _: |0 y Q
its took me 2 minit to fugure it out |