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1st    6 ball  ---  6 ball
/ N2 W' D. \# Q1 y0 p1 s2nd, take the heavy side  3 ball  --- 3 ball3 m+ F1 l8 x) z, e" I
third,  take the heavy side, random pick to 1 ball ---- 1 ball4 X$ ~3 ]# }* w! c# A: X2 M1 g8 I& R  ]
if which side is heavier, that's the heaveir side
& O% |& o2 D  |: m: E3 vtvb now,tvbnow,bttvbif they equal , then the other one is the heavy one