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1st    6 ball  ---  6 ball
" x/ Y5 H; y/ g1 x2nd, take the heavy side  3 ball  --- 3 ball
! H  E) z5 o% O# F' w( D/ l# I公仔箱論壇third,  take the heavy side, random pick to 1 ball ---- 1 ball
# }4 u- }$ K3 s, }* J. c公仔箱論壇if which side is heavier, that's the heaveir side
9 c' s0 e$ _5 l3 s( O! M2 Kif they equal , then the other one is the heavy one