i think its like this: 12乒乓球 oooooooooooo 天平 | * |! p" |# i! |0 ytvb now,tvbnow,bttvb1)6乒乓球 | 6乒乓球 % \. ^4 F, Q6 Z5 M8 {* u2) take the heavier side then 3乒乓球 | 3乒乓球 ! Q% j6 V$ ?0 K" ^7 b' m( dtvb now,tvbnow,bttvb3) take the heavier side then 1乒乓球(A) | 1乒乓球(B) with extra 1乒乓球(C) 8 S9 @, b8 z" \ c5 [6 t( o @5.39.217.76if A > B then A is the one ( f9 f; q I! n$ P( s: s2 ^if B > A then B is the one - t0 J; @* o3 K' U( c+ M公仔箱論壇if A = B then C is the one